Fixed INSTANCE not being assigned

src/main/java/wtf/hak/survivalfabric/config/ConfigManager.java

@@ -25,7 +25,8 @@ public class ConfigManager {
 
     public static Config load() {
         try(FileReader reader = new FileReader(CONFIG_FILE)) {
-            return GSON.fromJson(reader, Config.class);
+            INSTANCE = GSON.fromJson(reader, Config.class);
+            return INSTANCE;
         } catch (IOException e) {
             Config config = new Config();
             save(config);