PACKFIX: fix missing mxc for mitsumi the gremlin

packs/skip-and-loafer-mitsumi/skip-and-loafer-mitsumi.json

 {
   "title": "skip-and-loafer-mitsumi",
-  "id": "9e62a2d6-2471-4c69-8129-26acfb19ff03",
+  "id": "0ed2f02a-2c42-43a3-ba40-adf3504bf3c9",
   "stickers": [
     {
       "body": "cool-confident-sunglasses-off",
@@ -8,10 +8,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 97,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/yfrTIeeqdSymFxQrJhFKLbHJ"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/yfrTIeeqdSymFxQrJhFKLbHJ",
       "id": "skip-and-loafer-mitsumi-cool-confident-sunglasses-off"
     },
     {
@@ -20,10 +20,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 90,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/aOxKFWLSgigcIHnVFBqPhsRF"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/aOxKFWLSgigcIHnVFBqPhsRF",
       "id": "skip-and-loafer-mitsumi-cool-confident-sunglasses-on"
     },
     {
@@ -32,10 +32,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 113,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/ImKBknaoSZRXIprYVdPbRadC"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/ImKBknaoSZRXIprYVdPbRadC",
       "id": "skip-and-loafer-mitsumi-cool-sunglasses-no-confidence"
     },
     {
@@ -44,10 +44,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 112,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/mbPXrBXPjxyfIhhgvbGwqwlc"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/mbPXrBXPjxyfIhhgvbGwqwlc",
       "id": "skip-and-loafer-mitsumi-embarassed-flushed"
     },
     {
@@ -56,10 +56,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 105,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/XCmuNarwiVZaHsEtFusdIJIO"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/XCmuNarwiVZaHsEtFusdIJIO",
       "id": "skip-and-loafer-mitsumi-gremlin-just-woke-up-tired"
     },
     {
@@ -68,10 +68,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 97,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/aJNdUVXaKxREPhLVNMueZqap"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/aJNdUVXaKxREPhLVNMueZqap",
       "id": "skip-and-loafer-mitsumi-happy-bliss"
     },
     {
@@ -80,10 +80,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 106,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/uIuwmFoqFfSWweoaPzvhnqBX"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/uIuwmFoqFfSWweoaPzvhnqBX",
       "id": "skip-and-loafer-mitsumi-happy-sobbing-this-shit-real-good"
     },
     {
@@ -92,10 +92,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 114,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/syoKtEcyNOXcoMNlKyEClrAh"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/syoKtEcyNOXcoMNlKyEClrAh",
       "id": "skip-and-loafer-mitsumi-munch-tasty-happy"
     },
     {
@@ -104,10 +104,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 111,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/qLDsBqzXcLuLcgKnWoQMzUTP"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/qLDsBqzXcLuLcgKnWoQMzUTP",
       "id": "skip-and-loafer-mitsumi-peeking-book-spying"
     },
     {
@@ -116,10 +116,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 186,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/LTUMPqeMVEzGaBPVQyfhXGKj"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/LTUMPqeMVEzGaBPVQyfhXGKj",
       "id": "skip-and-loafer-mitsumi-scared-book"
     },
     {
@@ -128,10 +128,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 136,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/AivomkgHsQBYcxoWLesPOnDn"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/AivomkgHsQBYcxoWLesPOnDn",
       "id": "skip-and-loafer-mitsumi-scared-schocked-smartphone-wtf-just-read"
     },
     {
@@ -140,10 +140,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 123,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/cWAexCvwJSGpRzOokVkJalIn"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/cWAexCvwJSGpRzOokVkJalIn",
       "id": "skip-and-loafer-mitsumi-sipping-starbucks"
     },
     {
@@ -152,10 +152,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 112,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/vHySBZrzcnYoMREglVEKgMcD"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/vHySBZrzcnYoMREglVEKgMcD",
       "id": "skip-and-loafer-mitsumi-thinking"
     },
     {
@@ -164,10 +164,10 @@
         "mimetype": "image/png",
         "h": 128,
         "w": 108,
-        "thumbnail_url": "null"
+        "thumbnail_url": "mxc://baguette.party/ZTbCQikSPDpiiJmsVfdNCTar"
       },
       "msgtype": "m.sticker",
-      "url": "null",
+      "url": "mxc://baguette.party/ZTbCQikSPDpiiJmsVfdNCTar",
       "id": "skip-and-loafer-mitsumi-tired-red-eyes"
     }
   ]