Update Minecraft version to 1.21.8

Author: Saturn745

.github/workflows/main.yml

@@ -14,7 +14,7 @@ permissions:
 
 env:
   STUBGEN_BUILD_NUM: 29
-  MINECRAFT_VERSION: 1.21.7
+  MINECRAFT_VERSION: 1.21.8
   OPENJDK_REPO: https://github.com/openjdk/jdk21u-dev
   ADDITIONAL_DEFINITION_URLS: |
     https://raw.githubusercontent.com/LuaLink/LuaLinkV2/master/src/main/resources/lua/script.lua