Update qfieldcloud_sdk/sdk.py

Co-authored-by: Ivan Ivanov <suricactus@users.noreply.github.com>

Author: SeqLaz

qfieldcloud_sdk/sdk.py

@@ -633,7 +633,9 @@ def push_delta(self, project_id: str, delta_filename: str) -> Dict[str, Any]:
                 resp = self._request(
                     "POST",
                     f"deltas/{project_id}/",
-                    files=files,
+                    files={
+                      "file": delta_file
+                    },
                 )
             print(f"Response status code: {resp.status_code}")