Change local class to be an inner class because Srg2Source breaks with it

src/main/java/com/replaymod/recording/ReplayModRecording.java

@@ -56,11 +56,12 @@ public class ReplayModRecording {
         EventBus bus = FMLCommonHandler.instance().bus();
         bus.register(connectionEventHandler = new ConnectionEventHandler(logger, core));
 
-        @ChannelHandler.Sharable
-        class RestrictionsChannelHandler extends ChannelDuplexHandler {}
         NetworkRegistry.INSTANCE.newChannel(Restrictions.PLUGIN_CHANNEL, new RestrictionsChannelHandler());
     }
 
+    @ChannelHandler.Sharable
+    private static class RestrictionsChannelHandler extends ChannelDuplexHandler {}
+
     public void initiateRecording(NetworkManager networkManager) {
         connectionEventHandler.onConnectedToServerEvent(networkManager);
     }