Document translation of tasks

[Sama34]

As per mybb/mybb#5180

Document the translation of task titles and descriptions:

File: /inc/languages/english/admin/tools_tasks.lang.php

$l = [
	///...
	'task_hourlycleanup_title' => 'Hourly Cleanup',
	'task_hourlycleanup_description' => 'Cleans out old searches, captcha images, registration questions and expires redirects.',
	///...
];

https://github.com/mybb/docs.mybb.com/blob/gh-pages/1.8/development/translations/index.md

Regards.

[Sama34]

For example of translation variables:
arcalys/mybb-translation-french@f928304