fix: update type hint for audience parameter in _verify_and_decode_jwt method

Author: kishore7snehil

src/auth0_server_python/auth_server/server_client.py

@@ -214,7 +214,7 @@ async def _resolve_current_domain(self, store_options=None) -> str:
         return self._domain
 
     async def _verify_and_decode_jwt(
-        self, token: str, jwks: dict, audience: str | None = None
+        self, token: str, jwks: dict, audience: Optional[str] = None
     ) -> dict:
         """
         Find signing key in JWKS by kid and decode JWT.