Changed the `migration_style` config setting to `migration_type`

Signed-off-by: Jonathon Hill <jhill@brandmovers.com>
diff --git a/user_guide_src/source/libraries/migration.rst b/user_guide_src/source/libraries/migration.rst
index 2463961..1a73fb7 100644
--- a/user_guide_src/source/libraries/migration.rst
+++ b/user_guide_src/source/libraries/migration.rst
@@ -28,7 +28,7 @@
   helps prevent numbering conflicts when working in a team environment, and is
   the preferred scheme in CodeIgniter 3.0 and later.
 
-The desired style may be selected using the **$config['migration_style']**
+The desired style may be selected using the **$config['migration_type']**
 setting in your **migration.php** config file.
 
 Regardless of which numbering style you choose to use, prefix your migration
@@ -158,6 +158,6 @@
                                                                              version number.
 **migration_auto_latest**  FALSE                  TRUE / FALSE               Enable or disable automatically 
                                                                              running migrations.
-**migration_style**        'timestamp'            'timestamp' / 'sequential' The type of numeric identifier used to name
+**migration_type**        'timestamp'            'timestamp' / 'sequential' The type of numeric identifier used to name
                                                                              migration files.
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