[docs] Fix incorrect link markdown

Author: andrewnicols

general/app_releases/v3/v3.9.0.md

@@ -83,6 +83,6 @@ Learn more about our Pro and Premium subscriptions [here](https://moodle.com/app
 - [MOBILE-3407](https://tracker.moodle.org/browse/MOBILE-3407) - Drops aren't displayed in drag and drop into image questions in Moodle 3.6
 - [MOBILE-3420](https://tracker.moodle.org/browse/MOBILE-3420) - Blog images are not loaded properly
 - [MOBILE-3424](https://tracker.moodle.org/browse/MOBILE-3424) - Fix vulnerability in jQuery 1.9.1
-- [MOBILE-3438](https://tracker.moodle.org/browse/MOBILE-3438) - Update drag and drop code with changes on [MDL-58645](https://tracker.moodle.org/browse/MDL-58645]
+- [MOBILE-3438](https://tracker.moodle.org/browse/MOBILE-3438) - Update drag and drop code with changes on MDL-58645
 - [MOBILE-3443](https://tracker.moodle.org/browse/MOBILE-3443) - Big Modals on  landscape like multichoice on database are not closable
 - [MOBILE-3448](https://tracker.moodle.org/browse/MOBILE-3448) - File name is not unique when uploading