Update token name with more capabilities

.forgejo/workflows/auto-update-pr.yaml

@@ -53,11 +53,11 @@ jobs:
       - name: Create Pull Request
         if: steps.changes.outputs.changed == 'true'
         env:
-          PR_TOKEN : ${{ secrets.PR_TOKEN  }}
+          MINE_API_TOKEN : ${{ secrets.MINE_API_TOKEN  }}
         run: |
           echo "Creating PR..."
           curl -X POST \
-            -H "Authorization: token $PR_TOKEN " \
+            -H "Authorization: token $MINE_API_TOKEN " \
             -H "Content-Type: application/json" \
             -d '{
               "title": "chore: weekly flake update",