feat(minecraft): update to 1.21.9

Signed-off-by: Gabriel Harris-Rouquette <gabizou@me.com>

Author: gabizou

gradle.properties

@@ -12,7 +12,7 @@ mixinConfigs=mixins.sponge.accessors.json,mixins.sponge.api.json,mixins.sponge.c
   mixins.sponge.tracker.json,mixins.sponge.ipforward.json,mixins.sponge.optimization.json,mixins.sponge.test.json
 superClassChanges=common.superclasschange
 
-minecraftVersion=1.21.9-rc1
+minecraftVersion=1.21.9
 recommendedVersion=0-SNAPSHOT
 
 org.gradle.dependency.verification.console=verbose