Update blockquote migration docs to reflect #22949
Update blockquote migration docs to reflect #22949

Fixes #25669, closes #25779.

tjkohli/bootstrap,Lyricalz/bootstrap,Hemphill/bootstrap-docs,creativewebjp/bootstrap,nice-fungal/bootstrap,Hemphill/bootstrap-docs,seanwu99/bootstrap,GerHobbelt/bootstrap,zalog/bootstrap,stanwmusic/bootstrap,gijsbotje/bootstrap,fschumann1211/bootstrap,bootstrapbrasil/bootstrap,twbs/bootstrap,peterblazejewicz/bootstrap,gijsbotje/bootstrap,joblocal/bootstrap,kvlsrg/bootstrap,bardiharborow/bootstrap,Hemphill/bootstrap-docs,Hemphill/bootstrap-docs,joblocal/bootstrap,peterblazejewicz/bootstrap,m5o/bootstrap,nice-fungal/bootstrap,tagliala/bootstrap,bootstrapbrasil/bootstrap,yuyokk/bootstrap,yuyokk/bootstrap,Lyricalz/bootstrap,GerHobbelt/bootstrap,Lyricalz/bootstrap,bardiharborow/bootstrap,tjkohli/bootstrap,gijsbotje/bootstrap,twbs/bootstrap,seanwu99/bootstrap,coliff/bootstrap,stanwmusic/bootstrap,fschumann1211/bootstrap,zalog/bootstrap,Lyricalz/bootstrap,bootstrapbrasil/bootstrap,zalog/bootstrap,stanwmusic/bootstrap,fschumann1211/bootstrap,creativewebjp/bootstrap,tagliala/bootstrap,creativewebjp/bootstrap,m5o/bootstrap,inway/bootstrap,seanwu99/bootstrap,bardiharborow/bootstrap,joblocal/bootstrap,fschumann1211/bootstrap,bardiharborow/bootstrap,stanwmusic/bootstrap,yuyokk/bootstrap,creativewebjp/bootstrap,tagliala/bootstrap,gijsbotje/bootstrap,kvlsrg/bootstrap,inway/bootstrap,yuyokk/bootstrap,joblocal/bootstrap,coliff/bootstrap,peterblazejewicz/bootstrap,GerHobbelt/bootstrap,inway/bootstrap,nice-fungal/bootstrap,kvlsrg/bootstrap,seanwu99/bootstrap