fix: replace the get-changed-files action with @Ana06's fork

See jitterbit/get-changed-files#11. This action appears to be unmaintained and
is superceded by Ana06/get-changed-files.

.github/workflows/builder.yaml

@@ -25,7 +25,7 @@ jobs:
 
       - name: Get changed files
         id: changed_files
-        uses: jitterbit/get-changed-files@v1
+        uses: Ana06/get-changed-files@v2.2.0
 
       - name: Find add-on directories
         id: addons