try to fix approve action

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

Author: tobiasKaminsky

.github/workflows/renovate-approve-merge.yml

@@ -16,7 +16,8 @@ on:
       - stable*
 
 permissions:
-  contents: read
+  contents: write
+  pull-requests: write
 
 concurrency:
   group: renovate-approve-merge-${{ github.head_ref || github.run_id }}