fix: accessibility

Philip Rühlrequested to merge
fix/accessibility into main

Summary

Improvements to Accessibility

Description

  • High-contrast colors for buttons in email (same as toast messages in conference-frontend)
  • Replaced non-gender-neutral expressions by neutral expressions

Checklist

  • Have the changes been tested?
    • Behavior if other services fail
  • Have tests (e.g. unit tests) been adapted or new ones written?
  • Has the changelog been updated?
    • Have the dependencies on other services and their versions been documented?
  • Have all changes to configuration variables such as env vars been documented?
  • Do all submodules point to stable branches? (develop, master/main)
  • Are all pipelines completed successfully?
  • Was a review completed by someone else?
Edited by Philip Rühl

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