Apply suggestion from @gemini-code-assist[bot]

Giving pd.NAType a try instead of Any to see if that passes.

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: chalmerlowe

packages/db-dtypes/db_dtypes/json.py

@@ -32,7 +32,7 @@ class JSONDtype(pd.api.extensions.ExtensionDtype):
     name = "dbjson"
 
     @property
-    def na_value(self) -> pd.NA:  # type: ignore[valid-type]
+    def na_value(self) -> pd.NAType:
         """Default NA value to use for this type."""
         return pd.NA