Update workflow to use gh-app token for assignment

.github/workflows/auto-review.yml

@@ -11,7 +11,6 @@ jobs:
       pull-requests: write
       contents: read
       issues: write
-      read:org: read
 
     steps:
       - name: Checkout code
@@ -27,9 +26,16 @@ jobs:
           python -m pip install --upgrade pip
           pip install pyyaml
 
+      - name: Generate Bootc Actions Token
+        id: bootc_token
+        uses: actions/create-github-app-token@v1
+        with:
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
+
       - name: Assign reviewer
         env:
           PR_NUMBER: ${{ github.event.pull_request.number }}
-          GH_TOKEN: ${{ github.token }}
+          GH_TOKEN: ${{ steps.bootc_token.outputs.token }}
         run: |
           python .github/scripts/assign_reviewer.py