Apply suggestions from code review

Author: aaronsteers

airbyte_cdk/cli/airbyte_cdk/_connector.py

@@ -164,7 +164,7 @@ def test(
     pytest_args.append(str(test_file_path))
 
     if connector_directory:
-        build_dir = connector_directory / "build"
+        build_dir = connector_directory / "build" / "test-results"
         build_dir.mkdir(parents=True, exist_ok=True)
         junit_xml_path = build_dir / "standard-tests-junit.xml"
         pytest_args.extend(["--junitxml", str(junit_xml_path)])