build: add comment hashtag for version of action stale

Author: sbp-bvanb

.github/workflows/stale.yml

@@ -11,7 +11,7 @@ jobs:
   stale:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/stale@4391f3da665fdf50b6810c1a66712fb9ba21aa93
+      - uses: actions/stale@4391f3da665fdf50b6810c1a66712fb9ba21aa93 # v11.0.0
         with:
           days-before-stale: 63
           days-before-close: 21