Target 1.21.5 release protocol

Author: basaigh

protocol/src/main/java/org/geysermc/mcprotocollib/protocol/codec/MinecraftCodec.java

@@ -218,8 +218,8 @@
 
 public class MinecraftCodec {
     public static final PacketCodec CODEC = PacketCodec.builder()
-            .protocolVersion((1 << 30) | 242)
-            .minecraftVersion("1.21.5-rc1")
+            .protocolVersion(770)
+            .minecraftVersion("1.21.5")
             .state(ProtocolState.HANDSHAKE, MinecraftPacketRegistry.builder()
                     .registerServerboundPacket(ClientIntentionPacket.class, ClientIntentionPacket::new)
             )