Update update-homebrew.yml (#75)

Allow workflow to create the `update-homebrew` branch

Author: jeskew

.github/workflows/update-homebrew.yml

@@ -58,6 +58,7 @@ jobs:
         with:
           commit_message: Update Homebrew to v${{ steps.get_release_version.outputs.result }}
           branch: update-homebrew
+          create_branch: true
 
       - name: Shortcut for PR creation
-        run: echo "Use this link to create a PR -> https://github.com/Azure/homebrew-bicep/compare/main...update-homebrew"
+        run: echo "Use this link to create a PR -> https://github.com/Azure/homebrew-bicep/compare/main...update-homebrew"