refactor: update test case to use consistent echo commands in post tasks

tests/test_cli.py

@@ -340,9 +340,7 @@ class TestRunPostTasks:
 
     def test_run_post_tasks_without_conditions(self, temp_dir: Path) -> None:
         """Test running post tasks without conditions."""
-        spec = {
-            "post_tasks": [{"run": ["echo", "hello"]}, {"run": ["command", "hello"]}, {"run": ["command", "world"]}]
-        }
+        spec = {"post_tasks": [{"run": ["echo", "hello"]}, {"run": ["echo", "world"]}, {"run": ["echo", "test"]}]}
         context: dict[str, str] = {}
         cwd = temp_dir / "test_cwd"
         cwd.mkdir(parents=True, exist_ok=True)