Merge pull request #871 from google/delete-old-packages

ci: Fix permissions for deleting old packages.

Author: jaqx0r

.github/workflows/remove-old-package-versions.yml

@@ -7,7 +7,8 @@ jobs:
   remove-old-packages:
     runs-on: ubuntu-latest
     permissions:
-      contents: write
+      contents: read
+      packages: write  # Delete the packages
     steps:
       - uses: actions/delete-package-versions@v5
         with: