Update test_smoke.py

Author: stuck-inadream

tests/test_smoke.py

@@ -4,7 +4,7 @@
 def test_readme_exists():
     assert (pathlib.Path(__file__).parents[1] / "README.md").exists()
 
-def test_demo_imports():
-    # Should import without importing gradio (UI import is lazy)
+def test_gradio_demo_module_is_present():
+    # this does not import the module, so it will not run code or need deps
     spec = importlib.util.find_spec("gradio_demo")
     assert spec is not None