Fixes #19267: Mention grid class changes in migration docs
Fixes #19267: Mention grid class changes in migration docs

hebbet/bootstrap,vsn4ik/bootstrap,copperdesign/bootstrap,realcrowd/bootstrap,igoynawamreh/bootstrap,igoynawamreh/bootstrap,fschumann1211/bootstrap,Lyricalz/bootstrap,fschumann1211/bootstrap,wesamco/bootstrap-rtl,sealocal/bootstrap,bootstrapbrasil/bootstrap,janseliger/bootstrap,wesamco/bootstrap-rtl,stanwmusic/bootstrap,peterblazejewicz/bootstrap,lemuelbarango/bootstrap,edanbarak/bootstrap,stanwmusic/bootstrap,n054/bootstrap,NCARB/bootstrap,supergibbs/bootstrap,Delagen/bootstrap,stanwmusic/bootstrap,yuyokk/bootstrap,edanbarak/bootstrap,stanwmusic/bootstrap,bardiharborow/bootstrap,tibo66/bootstrap,tomlutzenberger/bootstrap,seanwu99/bootstrap,janseliger/bootstrap,xt0rted/bootstrap,fschumann1211/bootstrap,wesamco/bootstrap-rtl,davethegr8/bootstrap,inway/bootstrap,SweetProcess/bootstrap,Delagen/bootstrap,realcrowd/bootstrap,joblocal/bootstrap,tjkohli/bootstrap,frostbitten/bootstrap,joblocal/bootstrap,m5o/bootstrap,Hightrack/bootstrap,sealocal/bootstrap,GerHobbelt/bootstrap,davethegr8/bootstrap,Scoutski/bootstrap,frostbitten/bootstrap,JumpLinkNetwork/bootstrap-backward,xt0rted/bootstrap,edanbarak/bootstrap,JumpLinkNetwork/bootstrap-backward,edanbarak/bootstrap,Delagen/bootstrap,kvlsrg/bootstrap,GerHobbelt/bootstrap,tomlutzenberger/bootstrap,lemuelbarango/bootstrap,9-chirno/chirno,IdanCo/bootstrap,SweetProcess/bootstrap,janseliger/bootstrap,coliff/bootstrap,jipexu/bootstrap,inway/bootstrap,andresgalante/bootstrap,slavanga/bootstrap,NCARB/bootstrap,copperdesign/bootstrap,nice-fungal/bootstrap,jipexu/bootstrap,frostbitten/bootstrap,coliff/bootstrap,hebbet/bootstrap,9-chirno/chirno,inway/bootstrap,bootstrapbrasil/bootstrap,hebbet/bootstrap,lipis/bootstrap,gijsbotje/bootstrap,NCARB/bootstrap,gijsbotje/bootstrap,JumpLinkNetwork/bootstrap-backward,copperdesign/bootstrap,sealocal/bootstrap,bardiharborow/bootstrap,copperdesign/bootstrap,johnajacob/bootstrap,zalog/bootstrap,zalog/bootstrap,Scoutski/bootstrap,joblocal/bootstrap,Scoutski/bootstrap,Delagen/bootstrap,seanwu99/bootstrap,afuno/bootstrap,andresgalante/bootstrap,janseliger/bootstrap,Lyricalz/bootstrap,fschumann1211/bootstrap,johnajacob/bootstrap,supergibbs/bootstrap,creativewebjp/bootstrap,jipexu/bootstrap,tibo66/bootstrap,NCARB/bootstrap,hebbet/bootstrap,GerHobbelt/bootstrap,davethegr8/bootstrap,creativewebjp/bootstrap,IdanCo/bootstrap,zalog/bootstrap,abvalentine/bootstrap,Hemphill/bootstrap-docs,slavanga/bootstrap,vsn4ik/bootstrap,peterblazejewicz/bootstrap,n054/bootstrap,sealocal/bootstrap,Hemphill/bootstrap-docs,SweetProcess/bootstrap,Lyricalz/bootstrap,tibo66/bootstrap,yuyokk/bootstrap,lipis/bootstrap,lemuelbarango/bootstrap,peterblazejewicz/bootstrap,bootstrapbrasil/bootstrap,abvalentine/bootstrap,xt0rted/bootstrap,yuyokk/bootstrap,twbs/bootstrap,gijsbotje/bootstrap,xt0rted/bootstrap,jipexu/bootstrap,kvlsrg/bootstrap,lemuelbarango/bootstrap,JumpLinkNetwork/bootstrap-backward,igoynawamreh/bootstrap,IdanCo/bootstrap,wesamco/bootstrap-rtl,afuno/bootstrap,vsn4ik/bootstrap,abvalentine/bootstrap,TheFridayInstitute/bootstrap,Hemphill/bootstrap-docs,n054/bootstrap,TheFridayInstitute/bootstrap,johnajacob/bootstrap,supergibbs/bootstrap,IdanCo/bootstrap,Hightrack/bootstrap,andresgalante/bootstrap,bardiharborow/bootstrap,realcrowd/bootstrap,twbs/bootstrap,andresgalante/bootstrap,seanwu99/bootstrap,m5o/bootstrap,johnajacob/bootstrap,davethegr8/bootstrap,afuno/bootstrap,slavanga/bootstrap,supergibbs/bootstrap,tagliala/bootstrap,Lyricalz/bootstrap,TheFridayInstitute/bootstrap,tomlutzenberger/bootstrap,yuyokk/bootstrap,lipis/bootstrap,tagliala/bootstrap,Hemphill/bootstrap-docs,slavanga/bootstrap,Hightrack/bootstrap,creativewebjp/bootstrap,Scoutski/bootstrap,frostbitten/bootstrap,n054/bootstrap,realcrowd/bootstrap,tagliala/bootstrap,igoynawamreh/bootstrap,TheFridayInstitute/bootstrap,lipis/bootstrap,tjkohli/bootstrap,nice-fungal/bootstrap,nice-fungal/bootstrap,tibo66/bootstrap,afuno/bootstrap,creativewebjp/bootstrap,SweetProcess/bootstrap,joblocal/bootstrap,gijsbotje/bootstrap,kvlsrg/bootstrap,bardiharborow/bootstrap,9-chirno/chirno,vsn4ik/bootstrap,9-chirno/chirno,abvalentine/bootstrap,seanwu99/bootstrap