Update build_documentation.yml

Author: robertgendler

.github/workflows/build_documentation.yml

@@ -49,4 +49,5 @@ jobs:
         uses: peaceiris/actions-gh-pages@v3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          publish_dir: ${{ env.BUILD_PATH }}/dist          
+          publish_dir: ${{ env.BUILD_PATH }}/dist
+          publish_branch: nist-pages