[ticket/13405] Fix a typo in phpbb/migration/data/v310/style_update_p1.php

PHPBB3-13405
Merge pull request #3204 from rxu/ticket/13405

[ticket/13405] Fix a typo in phpbb/migration/data/v310/style_update_p1.php

* rxu/ticket/13405:
  [ticket/13405] Fix a typo in phpbb/migration/data/v310/style_update_p1.php
Merge branch 'develop-ascraeus' of https://github.com/phpbb/phpbb into ticket/13146
[ticket/13146] Fixing what merging broke

Merging added content I didn't expect it to add. This fixes back to what it is supposed to be.

PHPBB3-13146