Update shell to pwsh for setSPObjectId.ps1 script in azure.yaml

Author: jehayesms

ai-services/gpt-video-analysis-in-a-box/azure.yaml

@@ -11,7 +11,7 @@ hooks:
       interactive: true
       continueOnError: false
     posix:
-      shell: sh
+      shell: pwsh
       run: ./scripts/setSPObjectId.ps1
       interactive: true
       continueOnError: false