updated powershell in reindex_on_merge

.github/workflows/reindex_on_merge.yml

@@ -14,14 +14,14 @@ jobs:
     # This condition ensures the job only runs if the pull request was actually merged.
     if: github.event.pull_request.merged == true || github.event_name == 'workflow_dispatch'
 
-    # This tells GitHub to run this job on one of your self-hosted runners.
     runs-on: Windows
 
     # *** KEY CHANGE ***
-    # Set the default shell to PowerShell, which is native to your Windows runner.
+    # Changed the shell from 'pwsh' to 'powershell' to use the default
+    # Windows PowerShell, which should be available on your runner.
     defaults:
       run:
-        shell: pwsh
+        shell: powershell
 
     steps:
       # Step 1: Check out the repository's code