Fix version range mistake

Author: lowercasebtw

src/main/java/org/polyfrost/polyhitbox/mixin/MixinRenderManager.java

@@ -27,7 +27,7 @@
 
 @Mixin(EntityRenderDispatcher.class)
 public abstract class MixinRenderManager {
-    //#if MC >=1.21.4
+    //#if MC >=1.21.5
     @Unique
     private static ThreadLocal<Entity> polyhitbox$entity = ThreadLocal.withInitial(() -> null);
     //#endif