MISC: use png to print dependencies (pdf where empty ?_?)

utils/rust-deps/.gitignore

 *.pdf
+*.png

utils/scripts/print-cargo-deps.bash

@@ -5,16 +5,15 @@ cd "$(git rev-parse --show-toplevel)"
 _OUT="utils/rust-deps"
 TARGET_LIST="x86_64-unknown-linux-gnu x86_64-pc-windows-msvc aarch64-apple-darwin x86_64-apple-darwin"
 mkdir -p "$_OUT"
-rm -f "$_OUT/*.pdf"
 
 cargo install cargo-depgraph
-cargo depgraph --all-deps --dedup-transitive-deps                  | dot -Tpdf > "$_OUT/dependencies.all.pdf"
-cargo depgraph --all-deps --dedup-transitive-deps --workspace-only | dot -Tpdf > "$_OUT/dependencies.workspace.pdf"
+cargo depgraph --all-deps --dedup-transitive-deps                  | dot -Tpng > "$_OUT/dependencies.all.png"
+cargo depgraph --all-deps --dedup-transitive-deps --workspace-only | dot -Tpng > "$_OUT/dependencies.workspace.png"
 
 for TARGET in $TARGET_LIST
 do
     cargo depgraph \
         --all-deps --dedup-transitive-deps --no-default-features \
         --filter-platform "$TARGET" \
-        | dot -Tpdf -x -Gcompound=true -Gconcentrate=true > "$_OUT/dependencies.$TARGET.pdf"
+        | dot -Tpng -x -Gcompound=true -Gconcentrate=true > "$_OUT/dependencies.$TARGET.png"
 done