Draft: fix: mkdocs i18n plugin now requires new style config
This MR introduces:
- mkdocs i18n plugin now requires new style config (https://github.com/ultrabug/mkdocs-static-i18n/blob/main/config_update_to_v1.py)
relates to https://gitlab.ics.muni.cz/einfra-docs/documentation/-/jobs/1032895