chore(deps): take @conduction/nextcloud-vue 2.27.2

Levels this app with the fleet. 2.27.2 adds two fixes the earlier 2.27.0 pin does
not carry:

  * headerless is no longer chromeless — a flat KPI card in a borderless wrapper
    had no card, border or background at all;
  * a stat `variant` paints from the `-text` tokens rather than the fill tokens,
    which failed WCAG AA at 1.08:1 as a foreground colour. The KPI colour
    cleanup converted hardcoded values to `variant`, so this is what makes those
    conversions contrast-safe.

Lockfile only, and npm pruned nothing.

Author: rubenvdlinde