[ci] Use the comment command token for robotpy comment action (#6711)

.github/workflows/command-robotpy-pr.yml

@@ -9,15 +9,12 @@ on:
 
 jobs:
   comment:
-    permissions:
-      issues: write
-      pull-requests: write
-
     runs-on: ubuntu-latest
     steps:
       - name: Comment on PR
         uses: actions/github-script@v7
         with:
+          github-token: ${{ secrets.COMMENT_COMMAND_PAT_TOKEN }}
           script: |
             github.rest.issues.createComment({
                 issue_number: context.issue.number,