1.12.1

• Fixed mattermost couldn't find channel issue #1298 (Thanks @ananthkamath)
• Added a new language: Čeština (Thanks @Buchtic)
• Update axios to 0.26.0 due to vulnerability

How to update? Please read this:
https://github.com/louislam/uptime-kuma/wiki/%F0%9F%86%99-How-to-Update

Bug report:
https://github.com/louislam/uptime-kuma/issues

Thank you all contributors! Bug fix, code refactoring, language files update and code review!
@BCsabaEngine @OmgImAlexis