Update stubs to 1.21.6

Author: Saturn745

.github/workflows/main.yml

@@ -13,18 +13,18 @@ permissions:
   contents: write
 
 env:
-  STUBGEN_BUILD_NUM: 25
-  MINECRAFT_VERSION: 1.21.5
+  STUBGEN_BUILD_NUM: 29
+  MINECRAFT_VERSION: 1.21.6
   OPENJDK_REPO: https://github.com/openjdk/jdk21u-dev
   ADDITIONAL_DEFINITION_URLS: |
     https://raw.githubusercontent.com/LuaLink/LuaLinkV2/master/src/main/resources/lua/script.lua
     https://raw.githubusercontent.com/LuaLink/LuaLinkV2/master/src/main/resources/lua/scheduler.lua
   SOURCES_JAR_URLS: |
-    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-text-logger-slf4j/4.21.0/adventure-text-logger-slf4j-4.21.0-sources.jar
-    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-text-minimessage/4.11.0-SNAPSHOT/adventure-text-minimessage-4.11.0-20220309.063149-7-sources.jar
-    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-text-serializer-gson/4.21.0/adventure-text-serializer-gson-4.21.0-sources.jar
-    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-platform-bukkit/4.1.1-SNAPSHOT/adventure-platform-bukkit-4.1.1-20220228.221434-1.jar
-    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-api/4.21.0/adventure-api-4.21.0-sources.jar
+    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-text-logger-slf4j/4.23.0/adventure-text-logger-slf4j-4.23.0-sources.jar
+    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-text-minimessage/4.23.0/adventure-text-minimessage-4.23.0-sources.jar
+    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-text-serializer-gson/4.23.0/adventure-text-serializer-gson-4.23.0-sources.jar
+    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-platform-bukkit/4.4.0/adventure-platform-bukkit-4.4.0-sources.jar
+    https://repo.papermc.io/repository/maven-public/net/kyori/adventure-api/4.23.0/adventure-api-4.23.0-sources.jar
 
 jobs:
   build: