Update README.md

Author: Sairahcaz

README.md

@@ -122,9 +122,9 @@ $class::select('foo')->fromYesterday()->first()->toArray(); // return ['foo' =>
 
 ---
 
-This is a trait which makes the migration of your database in your test suite much, much faster!
+This is a trait which makes the migration of your database in your test suite much, **much faster**!
 The base idea comes from [Mayahi](https://mayahi.net/laravel/make-refresh-database-trait-much-faster/).
-It basically only migrates your database if the migration files has changed.
+It basically **only** migrates your database if the **migration** files has **changed**.
 So the first `migrate:fresh` takes awhile (depending on how many migrations you have), and then it's incredible fast.
 
 Optionally you can set `USEFUL_TRAITS_SEED_AFTER_FAST_DB_REFRESH` to `true` if you like to seed your database after the migration.