update regression tests info

agbenchmark/tests/basic_abilities/write_file/w_file_data.json

@@ -10,7 +10,7 @@
   },
   "mock_func": "basic_write_file_mock",
   "info": {
-    "difficulty": "easy",
+    "difficulty": "basic",
     "description": "Tests the writing to file",
     "side_effects": ["tests if there is in fact an LLM attached"]
   }

agbenchmark/tests/basic_abilities/write_file/write_file_test.py

@@ -16,6 +16,11 @@ class TestWriteFile(BasicChallenge):
         [(data.task, data.mock_func)],
         indirect=True,
     )
+    @pytest.mark.parametrize(
+        "regression_data",
+        [data],
+        indirect=True,
+    )
     @pytest.mark.depends(name="test_write_file")
     def test_write_file(self, workspace):
         file = self.open_file(workspace, data.ground.files[0])