Fix blocks registry not finding block (#462)

return the block name and not empty string

Obsidian/Registries/BlocksRegistry.cs

@@ -139,5 +139,5 @@ public static IBlock Get(Material material, IBlockState? state = null)
     }
 
     private static string GetSanitizedName(string value) =>
-        illegalBlockNames.Contains(value) ? $"{value}Block" : string.Empty;
+        illegalBlockNames.Contains(value) ? $"{value}Block" : value;
 }