Add link to the git repo in the arise group to README

README.md

@@ -4,6 +4,8 @@
 - Un-tar the archive or git clone the repository
   ```bash
   tar xvf arise-theme.tar
+  # Or, alternatively
+  git clone https://git.iiens.net/arise/arise-plymouth-theme
   ```
 - Copy the content of the folder into plymouth's data folder as root:
   ```bash
@@ -22,4 +24,5 @@
 
 ## Update instructions
 
-Just untar the new `arise-theme.tar` or pull from the repo then re-run the `install.sh` script.
\ No newline at end of file
+Just untar the new `arise-theme.tar` or pull from the repo then re-run
+the `install.sh` script.