chore: Pinned to v1.6.0 of aws-github-ops/handle-stale-discussions so that closed GitHub discussions are not auto-reopened. (#2085)

Author: ashishdhingra

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

@@ -13,6 +13,6 @@ jobs:
       discussions: write
     steps:
       - name: Stale discussions action
-        uses: aws-github-ops/handle-stale-discussions@v1
+        uses: aws-github-ops/handle-stale-discussions@v1.6.0
         env:
           GITHUB_TOKEN:  ${{secrets.GITHUB_TOKEN}}