Update create_search_index.yml (#14406)

Use the latest version of the `vimtor/action-zip` action.

Author: pabla

.github/workflows/create_search_index.yml

@@ -86,7 +86,7 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./docs/_site
       - name: Zip contents for artifacts
-        uses: vimtor/action-zip@v1
+        uses: vimtor/action-zip@v1.2
         with:
           files: >
             ./docs/_site/