Update the InternalServerError constructor type (#4210)

third_party/2and3/werkzeug/exceptions.pyi

@@ -147,6 +147,12 @@ class UnavailableForLegalReasons(HTTPException):
     description: Text
 
 class InternalServerError(HTTPException):
+    def __init__(
+        self,
+        description: Optional[Text] = ...,
+        response: Optional[Response] = ...,
+        original_exception: Optional[Exception] = ...,
+    ) -> None: ...
     code: int
     description: Text