Minecraft 1.21.4-pre2 support

Author: md-5

protocol/src/main/java/net/md_5/bungee/protocol/ProtocolConstants.java

@@ -48,7 +48,7 @@ public class ProtocolConstants
     public static final int MINECRAFT_1_20_5 = 766;
     public static final int MINECRAFT_1_21 = 767;
     public static final int MINECRAFT_1_21_2 = 768;
-    public static final int MINECRAFT_1_21_4 = 1073742047;
+    public static final int MINECRAFT_1_21_4 = 1073742048;
     public static final List<String> SUPPORTED_VERSIONS;
     public static final List<Integer> SUPPORTED_VERSION_IDS;