[CI] Set correct permissions for auto_request_review (pytorch#117408)

Pull Request resolved: pytorch#117408
Approved by: https://github.com/izaitsevfb, https://github.com/atalman

Author: malfet

.github/workflows/auto_request_review.yml

@@ -3,11 +3,13 @@ name: Auto Request Review
 on:
   pull_request:
     types: [opened, ready_for_review, reopened]
-
 jobs:
   auto-request-review:
     # Don't run on forked repos
     if: ${{ !github.event.pull_request.head.repo.fork }}
+    permissions:
+      contents: read
+      pull-requests: write
     name: Auto Request Review
     runs-on: ubuntu-latest
     steps: