revert(deps): Bump aws-actions/stale-issue-cleanup from 5 to 6 (#3871)

Reverts #3867

Dependabot is really aggressive with this one 🤔

Author: mrgrain

.github/workflows/close-stale-issues.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Stale issue job
     steps:
-    - uses: aws-actions/stale-issue-cleanup@v6
+    - uses: aws-actions/stale-issue-cleanup@v5
       with:
         # Setting messages to an empty string will cause the automation to skip
         # that category