fixing .zip extension

Author: VahagnTKA

src/superannotate/lib/core/usecases/models.py

@@ -205,10 +205,10 @@ def download_to_local_storage(self, destination: str, extract_zip=False):
                     raise AppException("Couldn't download export.")
                 time.sleep(1)
             self.reporter.stop_spinner()
-        filename = Path(export["path"]).name
+        filename = Path(export["path"]).stem
         for char in DownloadExportUseCase.FORBIDDEN_CHARS:
             filename=filename.replace(char, "_")
-        filepath = Path(destination) / filename
+        filepath = Path(destination) / (filename+'.zip')
         with requests.get(export["download"], stream=True) as response:
             response.raise_for_status()
             with open(filepath, "wb") as f: