[stable4.6] fix(appointments): Fix button style

[backportbot-nextcloud]

Backport of #5672

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (1b6acf9) 15.69% compared to head (3fd6885) 15.69%.
Report is 1 commits behind head on stable4.6.

Files	Patch %	Lines
...components/AppointmentConfigModal/Confirmation.vue	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           stable4.6    #5673   +/-   ##
==========================================
  Coverage      15.69%   15.69%           
==========================================
  Files            202      202           
  Lines           8660     8660           
  Branches        1744     1744           
==========================================
  Hits            1359     1359           
  Misses          7301     7301           

Flag	Coverage Δ
javascript	15.69% <0.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.