Update stale.yml

Author: naveensrinivasan

.github/workflows/stale.yml

@@ -24,7 +24,7 @@ jobs:
     permissions:
       issues: write
       pull-requests: write
-   runs-on: ubuntu-latest
+    runs-on: ubuntu-latest
     steps:
     - name: Harden Runner
       uses: step-security/harden-runner@bdb12b622a910dfdc99a31fdfe6f45a16bc287a4 # v1