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/NeoGradle/blob/NG_7.0/README.md#apply-parchment-mappings
 # you can also find the latest versions at: https://parchmentmc.org/docs/getting-started
-neogradle.subsystems.parchment.minecraftVersion=1.21.9
-neogradle.subsystems.parchment.mappingsVersion=2025.10.05
+neogradle.subsystems.parchment.minecraftVersion=1.20.4
+neogradle.subsystems.parchment.mappingsVersion=2024.04.14
 # 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