How switch locale for mermaid

I ask for help mermaid (in particular the Gantt chart)
By default, it displays the days of the week in English - I want it to be in Russian :blush:
I found out that the locale is set through the moment.js library
I even found out what construct can be switched to the Russian locale:
moment.lang (‘ru’);
I just don’t understand where to insert it … :crazy_face:

Please, follow the bug report template.

I can’t do it cos I can’t make new topic in bag place