ci: give write permissions

Author: carsakiller

.github/workflows/pull_request.yml

@@ -47,6 +47,8 @@ jobs:
   metadata:
     name: "Fetch Addon Metadata"
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
     steps:
       - uses: actions/checkout@v3
         name: Checkout LLS-Addons