📦 Fix compile error

Author: MrCrayfish

common/src/main/java/com/mrcrayfish/configured/client/screen/list/ListTypes.java

@@ -16,7 +16,7 @@
 
 public class ListTypes
 {
-    private static final IListType<?> UNKNOWN = new ListType<>(Object::toString, o -> o, "configured.parser.not_a_value");
+    public static final IListType<?> UNKNOWN = new ListType<>(Object::toString, o -> o, "configured.parser.not_a_value");
     public static final IListType<Boolean> BOOLEAN = new ListType<>(Object::toString, Boolean::valueOf, "configured.parser.not_a_boolean");
     public static final IListType<Integer> INTEGER = new ListType<>(Object::toString, Ints::tryParse, "configured.parser.not_a_number");
     public static final IListType<Long> LONG = new ListType<>(Object::toString, Longs::tryParse, "configured.parser.not_a_number");