Update test.yml

Author: faretek1

.github/workflows/test.yml

@@ -21,3 +21,7 @@ jobs:
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
     - name: Install devenv.sh
       run: nix profile add nixpkgs#devenv
+    - name: Build the devenv shell and run any git hooks
+      run: devenv test
+    - name: Run a single command in the devenv shell
+      run: devenv shell hello