python310Packages.flask-wtf: add anthonyroussel to maintainers

pkgs/development/python-modules/flask-wtf/default.nix

···
   meta = with lib; {
     description = "Simple integration of Flask and WTForms.";
     license = licenses.bsd3;
-    maintainers = with maintainers; [ mic92 ];
+    maintainers = with maintainers; [ mic92 anthonyroussel ];
     homepage = "https://github.com/lepture/flask-wtf/";
   };
 }