Fix error getting config 'user.name'

.github/workflows/doc.yml

@@ -27,6 +27,7 @@ jobs:
         sudo apt install doxygen
         pip install mkdocs mkdocs-material mkdocstrings pymdown-extensions mike
         cmake -E make_directory ${{runner.workspace}}/build
+        git config --global user.name "$(git --no-pager log --format=format:'%an' -n 1)"
 
     - name: Build
       working-directory: ${{runner.workspace}}/build