Forgot to install pytest

Author: hongquan

.github/workflows/install.yml

@@ -71,7 +71,7 @@ jobs:
               exit 1
           esac
 
-          python3 -m pip install --break-system-packages build
+          python3 -m pip install --break-system-packages build pytest
           wget -qO- https://astral.sh/uv/install.sh | sh
 
       - name: Fix Git config to satisfy Meson