Hi Albert,
One possible approach is to set up a translation and within that you could translate “upcoming” to “list”. We can’t really help you with that process but there are some learning resources out there you can refer to for this:
If you don’t need a translation for any other reason than to change the upcoming slug this may be overkill and/or too complicated. If so, an alternative approach could be to add some code to your theme’s functions.php file.
Whichever approach you choose, don’t forget to flush your rewrite rules by visting Settings > Permalinks.