Adjust CodeRabbit permissions to write pull_request

Signed-off-by: Tom Pantelis <tompantelis@gmail.com>

Author: tpantelis

.github/workflows/coderabbit-trigger.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     if: github.actor == 'dependabot[bot]' || github.actor == 'submariner-bot'
     permissions:
-      issues: write
+      pull-requests: write
     steps:
       - uses: actions/github-script@v8
         with: