Describe the bug

According to BootstrapVue

You can override the modal title via the named slot modal-title, override the header completely via the modal-header slot, and override the footer completely via the modal-footer slot.

But now it seems like these slot names have been changed to title, header and footer and it's not been mentioned anywhere in the migration docs, if someone would add it there along with any slot name changes it would save people migrating alot of time trying to debug it

Reproduction

https://bootstrap-vue-next.github.io/bootstrap-vue-next/docs/migration-guide.html#bmodal

Used Package Manager

npm