Update the mentors list (Laguntza:Mentoreak):

• the format is now [[User:Name]]|Description (be careful about the position of the | in the example!)
• add the following sentence at the top of the page, close to the list of mentors, as a visible call to action:

Please introduce yourself in a short way (240 characters max) so that newcomers will know more about you. To increase focus, your message will not render wikitext or links. [[mw:Special:MyLanguage/Growth/Communities/How to introduce yourself as a mentor|See examples and best practices.]]