Update azure-preview-env-deploy.yml (#50382)

.github/workflows/azure-preview-env-deploy.yml

@@ -187,6 +187,8 @@ jobs:
       - if: ${{ env.IS_PUBLIC_BUILD == 'true' }}
         name: Move acceptable user changes
         run: |
+          # Don't allow users to change code here
+          rm -rf ./user-code/src/workflows
           # Make sure recursive path expansion is enabled
           shopt -s globstar
           rsync -rptovR ./user-code/content/./**/*.md ./content