Update MDK with new output from mod generator

Author: neoforge-mdk-automation[bot]

gradle.properties

@@ -7,8 +7,8 @@ org.gradle.configuration-cache=true
 
 #read more on this at https://github.com/neoforged/ModDevGradle?tab=readme-ov-file#better-minecraft-parameter-names--javadoc-parchment
 # you can also find the latest versions at: https://parchmentmc.org/docs/getting-started
-parchment_minecraft_version=1.21.10
-parchment_mappings_version=2025.10.12
+parchment_minecraft_version=1.21.11
+parchment_mappings_version=2025.12.20
 # Environment Properties
 # You can find the latest versions here: https://projects.neoforged.net/neoforged/neoforge
 # The Minecraft version must agree with the Neo version to get a valid artifact