Update cap mixin for 1.20 changes

Author: embeddedt

forge/src/main/java/org/embeddedt/modernfix/forge/mixin/perf/forge_cap_retrieval/LivingEntityMixin.java

@@ -3,7 +3,7 @@
 import net.minecraft.core.Direction;
 import net.minecraft.world.entity.LivingEntity;
 import net.minecraftforge.common.capabilities.Capability;
-import net.minecraftforge.items.CapabilityItemHandler;
+import net.minecraftforge.common.capabilities.ForgeCapabilities;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Redirect;
@@ -19,6 +19,6 @@ public class LivingEntityMixin {
      */
     @Redirect(method = "getCapability", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/entity/LivingEntity;isAlive()Z"))
     private <T> boolean checkAliveAfterCap(LivingEntity entity, Capability<T> capability, @Nullable Direction facing) {
-        return capability == CapabilityItemHandler.ITEM_HANDLER_CAPABILITY && entity.isAlive();
+        return capability == ForgeCapabilities.ITEM_HANDLER && entity.isAlive();
     }
 }