minor: fix syntax error

also remove copying of test files because do not need those

.github/workflows/static.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Build Documentation
         run: sphinx-build -b html ./docs ./_build
       - name: Copy test files to _build directory
-          run: cp -r tests/ ./_build && cp docs/postBuild ./_build
+        run: cp ./docs/postBuild ./_build
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Push _build to gh_pages branch