Add Badges entry to v4 migration guide; fixes #18506
Add Badges entry to v4 migration guide; fixes #18506

[ci skip]

davethegr8/bootstrap,kvlsrg/bootstrap,zalog/bootstrap,johnajacob/bootstrap,Hemphill/bootstrap-docs,TheFridayInstitute/bootstrap,JumpLinkNetwork/bootstrap-backward,tomlutzenberger/bootstrap,bardiharborow/bootstrap,tjkohli/bootstrap,lemuelbarango/bootstrap,gijsbotje/bootstrap,andresgalante/bootstrap,Scoutski/bootstrap,bootstrapbrasil/bootstrap,supergibbs/bootstrap,abvalentine/bootstrap,vsn4ik/bootstrap,SweetProcess/bootstrap,9-chirno/chirno,frostbitten/bootstrap,igoynawamreh/bootstrap,tomlutzenberger/bootstrap,inway/bootstrap,n054/bootstrap,9-chirno/chirno,afuno/bootstrap,TheFridayInstitute/bootstrap,Hemphill/bootstrap-docs,Delagen/bootstrap,tomlutzenberger/bootstrap,n054/bootstrap,hebbet/bootstrap,9-chirno/chirno,NCARB/bootstrap,hebbet/bootstrap,hebbet/bootstrap,GerHobbelt/bootstrap,janseliger/bootstrap,wesamco/bootstrap-rtl,inway/bootstrap,bootstrapbrasil/bootstrap,peterblazejewicz/bootstrap,xt0rted/bootstrap,coliff/bootstrap,onenameio/rhythm-bootstrap,tibo66/bootstrap,frostbitten/bootstrap,edanbarak/bootstrap,jipexu/bootstrap,vitaligent/4,slavanga/bootstrap,xt0rted/bootstrap,sealocal/bootstrap,IdanCo/bootstrap,stanwmusic/bootstrap,tagliala/bootstrap,vsn4ik/bootstrap,lipis/bootstrap,abvalentine/bootstrap,SweetProcess/bootstrap,lipis/bootstrap,onenameio/rhythm-bootstrap,nice-fungal/bootstrap,david-schopf/bootstrap,IdanCo/bootstrap,blockstack/blockstack-bootstrap,bardiharborow/bootstrap,tagliala/bootstrap,kvlsrg/bootstrap,zalog/bootstrap,janseliger/bootstrap,sealocal/bootstrap,creativewebjp/bootstrap,igoynawamreh/bootstrap,stanwmusic/bootstrap,igoynawamreh/bootstrap,joblocal/bootstrap,m5o/bootstrap,david-schopf/bootstrap,gijsbotje/bootstrap,seanwu99/bootstrap,tagliala/bootstrap,xt0rted/bootstrap,Delagen/bootstrap,davethegr8/bootstrap,lipis/bootstrap,edanbarak/bootstrap,sealocal/bootstrap,9-chirno/chirno,abvalentine/bootstrap,twbs/bootstrap,janseliger/bootstrap,slavanga/bootstrap,tjkohli/bootstrap,andresgalante/bootstrap,joblocal/bootstrap,yuyokk/bootstrap,m5o/bootstrap,NCARB/bootstrap,TheFridayInstitute/bootstrap,bootstrapbrasil/bootstrap,nice-fungal/bootstrap,joblocal/bootstrap,fschumann1211/bootstrap,edanbarak/bootstrap,afuno/bootstrap,peterblazejewicz/bootstrap,bardiharborow/bootstrap,JumpLinkNetwork/bootstrap-backward,seanwu99/bootstrap,Hightrack/bootstrap,hebbet/bootstrap,zalog/bootstrap,johnajacob/bootstrap,Delagen/bootstrap,andresgalante/bootstrap,tibo66/bootstrap,nice-fungal/bootstrap,Scoutski/bootstrap,copperdesign/bootstrap,realcrowd/bootstrap,vitaligent/4,Hemphill/bootstrap-docs,peterblazejewicz/bootstrap,joblocal/bootstrap,creativewebjp/bootstrap,bardiharborow/bootstrap,vitaligent/4,coliff/bootstrap,supergibbs/bootstrap,johnajacob/bootstrap,abvalentine/bootstrap,vsn4ik/bootstrap,n054/bootstrap,janseliger/bootstrap,fschumann1211/bootstrap,igoynawamreh/bootstrap,yuyokk/bootstrap,realcrowd/bootstrap,xt0rted/bootstrap,yuyokk/bootstrap,frostbitten/bootstrap,vsn4ik/bootstrap,seanwu99/bootstrap,seanwu99/bootstrap,NCARB/bootstrap,JumpLinkNetwork/bootstrap-backward,Lyricalz/bootstrap,kvlsrg/bootstrap,NCARB/bootstrap,realcrowd/bootstrap,copperdesign/bootstrap,fschumann1211/bootstrap,n054/bootstrap,lipis/bootstrap,afuno/bootstrap,twbs/bootstrap,lemuelbarango/bootstrap,gijsbotje/bootstrap,jipexu/bootstrap,stanwmusic/bootstrap,lemuelbarango/bootstrap,frostbitten/bootstrap,supergibbs/bootstrap,Scoutski/bootstrap,Hightrack/bootstrap,edanbarak/bootstrap,GerHobbelt/bootstrap,Lyricalz/bootstrap,wesamco/bootstrap-rtl,andresgalante/bootstrap,IdanCo/bootstrap,Hemphill/bootstrap-docs,Lyricalz/bootstrap,SweetProcess/bootstrap,yuyokk/bootstrap,tibo66/bootstrap,SweetProcess/bootstrap,fschumann1211/bootstrap,creativewebjp/bootstrap,copperdesign/bootstrap,inway/bootstrap,tibo66/bootstrap,slavanga/bootstrap,Scoutski/bootstrap,johnajacob/bootstrap,blockstack/blockstack-bootstrap,wesamco/bootstrap-rtl,TheFridayInstitute/bootstrap,jipexu/bootstrap,Lyricalz/bootstrap,IdanCo/bootstrap,copperdesign/bootstrap,david-schopf/bootstrap,lemuelbarango/bootstrap,wesamco/bootstrap-rtl,stanwmusic/bootstrap,davethegr8/bootstrap,supergibbs/bootstrap,onenameio/rhythm-bootstrap,creativewebjp/bootstrap,jipexu/bootstrap,JumpLinkNetwork/bootstrap-backward,Hightrack/bootstrap,slavanga/bootstrap,gijsbotje/bootstrap,afuno/bootstrap,GerHobbelt/bootstrap,Delagen/bootstrap,realcrowd/bootstrap,sealocal/bootstrap,blockstack/blockstack-bootstrap,davethegr8/bootstrap