Refactored adapter registrations in config setup

Replaced deprecated methods with updated adapter instances for `Location`, `Material`, and `World`.

Author: NonSwag

src/main/java/net/thenextlvl/tweaks/TweaksPlugin.java

@@ -282,9 +282,9 @@ private void initConfigs() {
         this.config = new GsonFile<>(
                 IO.of(getDataFolder(), "config.json"),
                 new PluginConfig(), new GsonBuilder()
-                .registerTypeHierarchyAdapter(Location.class, LocationAdapter.simple())
-                .registerTypeHierarchyAdapter(Material.class, MaterialAdapter.instance())
-                .registerTypeHierarchyAdapter(World.class, WorldAdapter.key())
+                .registerTypeHierarchyAdapter(Location.class, new LocationAdapter.Simple())
+                .registerTypeHierarchyAdapter(Material.class, new MaterialAdapter())
+                .registerTypeHierarchyAdapter(World.class, new WorldAdapter.Key())
                 .setPrettyPrinting()
                 .serializeNulls()
                 .create()