impr: replace ß in all variations of swiss german (Jeanot-Zubler)

[Jeanot-Zubler]

Description

Replace the german character ß with ss for all variations of swiss german, including swiss_german_1k and swiss_german_2k.

Checks

• Adding quotes?
  • Make sure to include translations for the quotes in the description (or another comment) so we can verify their content.
• Adding a language or a theme?
  • If is a language, did you edit _list.json, _groups.json and add languages.json?
  • If is a theme, did you add the theme.css?
    • Also please add a screenshot of the theme, it would be extra awesome if you do so!
• Check if any open issues are related to this PR; if so, be sure to tag them below.
• Make sure the PR title follows the Conventional Commits standard. (https://www.conventionalcommits.org for more info)
• Make sure to include your GitHub username inside parentheses at the end of the PR title

Relates to

Initial implementation of the feature resulted from Issue #3699

[Miodec]

Thanks