Update StaleBranch workflow to prod and run every 12 hours

Author: dstrome

.github/workflows/StaleBranch.yml

@@ -5,15 +5,15 @@ permissions:
 
 on:
   schedule:
-    - cron: "0 */6 * * *"
+    - cron: "0 */12 * * *"
 
   workflow_dispatch:
 
 
 jobs:
 
   stale-branch:
-    uses: MicrosoftDocs/microsoft-365-docs/.github/workflows/Shared-StaleBranch.yml@workflows-test
+    uses: MicrosoftDocs/microsoft-365-docs/.github/workflows/Shared-StaleBranch.yml@workflows-prod
     with:
         PayloadJson: ${{ toJSON(github) }}
         RepoBranchSkipList: '[