New feeds proposal

Greetings!
I'd like to propose new feeds for the database, which are regularily published, but don't have any stable links
Those are:
MPK Częstochowa (https://mpk.czest.pl/public/cloud/index.php/s/uutbhxukj2pYM6T?path=%2FDane%20rozk%C5%82adowe)
ZDZIT Olsztyn (https://zdzit.olsztyn.eu/gtfs/)
ZIM Słupsk (https://zimslupsk.pl/otwarte-dane.html)
Thanks in advance!