[Bug Report][3.6.12] VCalendar event slot doesn't work

[buddy94]

Environment

Vuetify Version: 3.6.12
Vue Version: 3.4.31
Browsers: Chrome 126.0.0.0
OS: Windows 10

Steps to reproduce

Just try the <template #event="{ event, day }"> in the calendar! Doesn't do anything.

In comparison <template #header="{ title }"> works fine

Expected Behavior

With the event slot you can customize the event as you wish

Actual Behavior

Doesn't do anything

Reproduction Link

https://play.vuetifyjs.com/#...

[blalan05]

Duplicate of #19020