jetty_11,jetty_12: add anthonyroussel to maintainers

pkgs/servers/http/jetty/common.nix

···
     platforms = platforms.all;
     sourceProvenance = with sourceTypes; [ binaryBytecode ];
     license = with licenses; [ asl20 epl10 ];
-    maintainers = with maintainers; [ emmanuelrosa ];
+    maintainers = with maintainers; [ emmanuelrosa anthonyroussel ];
   };
 }