fix: address json kwarg propagation

Author: markis

vcr/stubs/aiohttp_stubs.py

@@ -245,7 +245,7 @@ async def new_request(self, method, url, **kwargs):
         headers = kwargs.get("headers")
         auth = kwargs.get("auth")
         headers = self._prepare_headers(headers)
-        data = kwargs.get("data", kwargs.get("json"))
+        data = kwargs.get("json", kwargs.get("data"))
         params = kwargs.get("params")
         cookies = kwargs.get("cookies")