Fix initial documentation cache creation

Author: Xaymar

.github/workflows/documentation.yml

@@ -44,7 +44,7 @@ jobs:
       run: |
         mkdir -p build/docs/html
         pushd build/docs/html
-        git init --bare
+        git init
         git switch --orphan documentation
         git remote add -t documentation origin ${{ github.repositoryUrl }}
         popd