Put back the issues-write permission for pr-labeler (#7277)

Required per https://docs.github.com/en/rest/issues/labels?apiVersion=2022-11-28#add-labels-to-an-issue

Author: pavoljuhas

.github/workflows/pr-labeler.yaml

@@ -51,6 +51,7 @@ jobs:
     timeout-minutes: 5
     permissions:
       contents: read
+      issues: write
       pull-requests: write
     env:
       PR_NUMBER: ${{inputs.pr-number || github.event.pull_request.number}}