Merge pull request #246443 from schuelermine/mainProgram/weechat

weechat: set mainProgram

pkgs/applications/networking/irc/weechat/default.nix

···
         '';
         license = lib.licenses.gpl3;
         maintainers = with lib.maintainers; [ ncfavier ];
+        mainProgram = "weechat";
         platforms = lib.platforms.unix;
       };
     }