fix: Add missing api_call decorator for create_upload_session (#686)

Author: arjankowski

boxsdk/object/file.py

@@ -45,6 +45,7 @@ def preflight_check(self, size: int, name: Optional[str] = None) -> Optional[str
             file_id=self._object_id,
         )
 
+    @api_call
     def create_upload_session(self, file_size: int, file_name: Optional[str] = None) -> 'UploadSession':
         """
         Create a new chunked upload session for uploading a new version of the file.

boxsdk/object/folder.py

@@ -112,6 +112,7 @@ def preflight_check(self, size: int, name: str) -> Optional[str]:
             parent_id=self._object_id,
         )
 
+    @api_call
     def create_upload_session(self, file_size: int, file_name: str) -> 'UploadSession':
         """
         Creates a new chunked upload session for upload a new file.