update error message

Datapack made painting variant support is added in PaperMC#11244

Author: Lulu13022002

patches/server/0925-Fixup-NamespacedKey-handling.patch

@@ -68,15 +68,15 @@ index afed8bdb9bd6a135e9b5f7bd9bfc61964cb240f7..bb2d1dddca6bfe719b28df136e80a7c5
          }
      }
 diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPainting.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPainting.java
-index bcac1359c667ef1ee46384f9c7a5adf4010d2b08..f2a4dfc80ccd9594ebfef7c49583cf6a090712e0 100644
+index bcac1359c667ef1ee46384f9c7a5adf4010d2b08..8a22842f96c3d27bd308fc2bcb932e0653d42c36 100644
 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPainting.java
 +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPainting.java
 @@ -16,7 +16,7 @@ public class CraftPainting extends CraftHanging implements Painting {
 
      @Override
      public Art getArt() {
 -        return CraftArt.minecraftHolderToBukkit(this.getHandle().getVariant());
-+        return org.bukkit.craftbukkit.CraftRegistry.unwrapAndConvertHolder(org.bukkit.Registry.ART, this.getHandle().getVariant()).orElseThrow(() -> new IllegalStateException("Inlined or datapack made painting variant are not supported yet in the API!")); // Paper
++        return org.bukkit.craftbukkit.CraftRegistry.unwrapAndConvertHolder(org.bukkit.Registry.ART, this.getHandle().getVariant()).orElseThrow(() -> new IllegalStateException("Inlined painting variant are not supported yet in the API!")); // Paper
      }
 
      @Override