chore: scope the stale_issue.yaml workflow to run only on this repository (#205)

Author: ianbotsf

.github/workflows/stale_issue.yml

@@ -11,6 +11,7 @@ jobs:
   cleanup:
     runs-on: ubuntu-latest
     name: Stale issue job
+    if: github.repository == 'aws/aws-crt-kotlin'
     steps:
     - uses: aws-actions/stale-issue-cleanup@v3
       with: