Initial 1.21.9 support

Author: UserNugget

src/main/java/net/elytrium/limboreconnect/LimboReconnect.java

@@ -169,6 +169,7 @@ public void reload() {
             new PacketMapping(0x68, ProtocolVersion.MINECRAFT_1_20_5, true),
             new PacketMapping(0x6f, ProtocolVersion.MINECRAFT_1_21_2, true),
             new PacketMapping(0x6e, ProtocolVersion.MINECRAFT_1_21_5, true),
+            new PacketMapping(0x73, ProtocolVersion.MINECRAFT_1_21_9, true),
             });
 
     this.offlineTitles.clear();