Fix "copy labels from issues" workflow not having the appropriate permissions to do what it claims to do (#36602)

.github/workflows/pull-request-copy-labels.yml

@@ -1,13 +1,19 @@
+name: Copy labels from linked issues
+
 on:
   pull_request:
     types: [opened]
 
+permissions:
+  issues: write # to read the labels of any linked issue(s), and to put the found labels if any on the PR
+  # not granting any `pull_requests` permissions because in github's modeling pull requests are a subset of issues. it's confusing.
+
 jobs:
   copy-labels:
     runs-on: ubuntu-latest
     name: Copy labels from linked issues
     steps:
-      - name: copy-labels
+      - name: Copy labels
         uses: michalvankodev/copy-issue-labels@v1.3.0
         with:
           repo-token: ${{ secrets.GITHUB_TOKEN }}