Update handle-stale-discussions.yml (#251)

Author: stobrien89

.github/workflows/handle-stale-discussions.yml

@@ -7,6 +7,7 @@ on:
 
 jobs:
   handle-stale-discussions:
+    if: github.repository_owner == 'aws'
     name: Handle stale discussions
     runs-on: ubuntu-latest
     permissions:
@@ -15,4 +16,4 @@ jobs:
       - name: Stale discussions action
         uses: aws-github-ops/handle-stale-discussions@v1
         env:
-          GITHUB_TOKEN:  ${{secrets.GITHUB_TOKEN}}
+          GITHUB_TOKEN:  ${{secrets.GITHUB_TOKEN}}