fix RegistryMixin target class

platforms/mixin-lifecycle/src/main/java/com/dfsek/terra/lifecycle/mixin/RegistryMixin.java

@@ -1,5 +1,6 @@
 package com.dfsek.terra.lifecycle.mixin;
 
+import net.minecraft.registry.Registries;
 import net.minecraft.registry.Registry;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
@@ -9,7 +10,7 @@ import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 import com.dfsek.terra.lifecycle.util.RegistryUtil;
 
 
-@Mixin(Registry.class)
+@Mixin(Registries.class)
 public class RegistryMixin {
     @Inject(method = "<clinit>", at = @At("RETURN"))
     private static void registerTerraGenerators(CallbackInfo ci) {