CI is sometimes failing for language tests

[niccokunzmann]

Sometimes, one of the CI tests fails saying that a certain language is nor present. Happened with German and French and in the mobile view.

https://github.com/niccokunzmann/open-web-calendar/actions/runs/8705875696/job/23877216759#step:5:1055

    Then we cannot see the text "Kalender"                                                       # features/steps/browser_steps.py:107
    When we click on a link containing "Deutsch"                                                 # features/steps/browser_steps.py:87
    Then we can see the text "Kalender"                                                          # features/steps/browser_steps.py:112
      Assertion Failed: 'Kalender' is invisible but should be visible

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