fix unit test

the extraction does not create the `crate/` dir automatically, but just
extracts to the given path.

Author: bernt-matthias

test/unit/data/model/test_model_store.py

@@ -740,12 +740,12 @@ def test_export_invocation_to_ro_crate_archive(tmp_path):
     workflow_invocation = _setup_invocation(app)
 
     crate_zip = tmp_path / "crate.zip"
+    crate_directory = tmp_path / "crate"
     with store.ROCrateArchiveModelExportStore(crate_zip, app=app, export_files="symlink") as export_store:
         export_store.export_workflow_invocation(workflow_invocation)
     with CompressedFile(crate_zip) as compressed_file:
         assert compressed_file.file_type == "zip"
-        compressed_file.extract(tmp_path)
-    crate_directory = tmp_path / "crate"
+        compressed_file.extract(crate_directory)
     validate_invocation_crate_directory(crate_directory)