Request.json property is only Any (#3070)

Author: davidism

CHANGES.rst

@@ -9,6 +9,7 @@ Unreleased
 -   The multipart form parser handles a ``\r\n`` sequence at a chunk boundary.
     :issue:`3065`
 -   Improve CPU usage during Watchdog reloader. :issue:`3054`
+-   `Request.json` annotation is more accurate. :issue:`3067`
 
 
 Version 3.1.3

src/werkzeug/wrappers/request.py

@@ -542,7 +542,7 @@ def url_root(self) -> str:
     json_module = json
 
     @property
-    def json(self) -> t.Any | None:
+    def json(self) -> t.Any:
         """The parsed JSON data if :attr:`mimetype` indicates JSON
         (:mimetype:`application/json`, see :attr:`is_json`).