docs: fix out-of-dated explanation

Author: kenjis

app/Config/Migrations.php

@@ -25,9 +25,7 @@ class Migrations extends BaseConfig
      *
      * This is the name of the table that will store the current migrations state.
      * When migrations runs it will store in a database table which migration
-     * level the system is at. It then compares the migration level in this
-     * table to the $config['migration_version'] if they are not the same it
-     * will migrate up. This must be set.
+     * files have already been run.
      */
     public string $table = 'migrations';