fixing a typo in the comments of the migration config file
diff --git a/application/config/migration.php b/application/config/migration.php
index 88e3982..7645ade 100644
--- a/application/config/migration.php
+++ b/application/config/migration.php
@@ -44,7 +44,7 @@
 |
 | 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 the this
+| 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.
 |