release-tracker.yml: grant permission-pull-requests to LGTM App

Signed-off-by: Tamal Saha <tamal@appscode.com>

Author: tamalsaha

.github/workflows/release-tracker.yml

@@ -20,6 +20,7 @@ jobs:
           private-key: ${{ secrets.LGTM_APP_PRIVATE_KEY }}
           owner: ${{ github.repository_owner }}
           repositories: CHANGELOG
+          permission-pull-requests: write
 
       - name: Update release tracker
         env: