docs(changelog): add breaking change for md-dialog-content
docs(changelog): add breaking change for md-dialog-content

Closes #5470.

ilovett/material,n1vlac/material,flowersinthesand/material,CarmenPopoviciu/material,programmist/material,oostmeijer/material,hodeyp/material,kamilkisiela/material,profoundry-us/material,kwypchlo/material,DevVersion/material,welkinhealth/material,oostmeijer/material,marekmicek/material,imjoeco/material,ErinCoughlan/material,HipsterZipster/material,colinskow/material,DerekLouie/material,Splaktar/material,jadjoubran/material,imjoeco/material,Todd-Werelius/material,Todd-Werelius/material,crisbeto/material,kamilkisiela/material,JonFerrera/material,DevVersion/material,bluebirdtech/material,dmitriz/material,clshortfuse/material,david-gang/material,ServiceManagementGroup/material,bluebirdtech/material,jelbourn/material,programmist/material,marekmicek/material,welkinhealth/material,imjoeco/material,graingert/material,HipsterZipster/material,epelc/material,JonFerrera/material,kamilkisiela/material,kamilkisiela/material,daniel-nagy/material,angular/material,Frank3K/material,vertazzar/material,amithub/Angular-Material-Web-Design,marekmicek/material,epelc/material,vertazzar/material,kwypchlo/material,gmoothart/material,isaaclyman/material,CarmenPopoviciu/material,Todd-Werelius/material,j3ski/material,epelc/material,DevVersion/material,crisbeto/material,robertmesserle/material,epelc/material,clshortfuse/material,isaaclyman/material,BernhardRode/material,n1vlac/material,SamDLT/material,j3ski/material,programmist/material,gkalpak/material,oostmeijer/material,CarmenPopoviciu/material,acoreyj/material,ServiceManagementGroup/material,n1vlac/material,bOOm-X/material,acoreyj/material,amithub/Angular-Material-Web-Design,profoundry-us/material,crisbeto/material,CarmenPopoviciu/material,dmitriz/material,kwypchlo/material,ErinCoughlan/material,gmoothart/material,DevVersion/material,Frank3K/material,hodeyp/material,2947721120/angular-material,JonFerrera/material,Todd-Werelius/material,ilovett/material,amithub/Angular-Material-Web-Design,dmitriz/material,pwistbac/material,n1vlac/material,ilovett/material,gmoothart/material,kwypchlo/material,flowersinthesand/material,graingert/material,profoundry-us/material,2947721120/angular-material,ServiceManagementGroup/material,miguelcobain/material,miguelcobain/material,hodeyp/material,pwistbac/material,miguelcobain/material,jadjoubran/material,robertmesserle/material,profoundry-us/material,hayloft/material,2947721120/angular-material,DerekLouie/material,HipsterZipster/material,HarrisCorp/material,bOOm-X/material,colinskow/material,clshortfuse/material,isaaclyman/material,welkinhealth/material,jadjoubran/material,colinskow/material,bluebirdtech/material,vertazzar/material,HarrisCorp/material,robertmesserle/material,SamDLT/material,jelbourn/material,hayloft/material,jadjoubran/material,j3ski/material,HipsterZipster/material,angular/material,imjoeco/material,hayloft/material,vertazzar/material,hayloft/material,dmitriz/material,programmist/material,marekmicek/material,isaaclyman/material,SamDLT/material,flowersinthesand/material,gkalpak/material,acoreyj/material,gkalpak/material,graingert/material,oostmeijer/material,daniel-nagy/material,miguelcobain/material,jelbourn/material,amithub/Angular-Material-Web-Design,david-gang/material,BernhardRode/material,JonFerrera/material,bOOm-X/material,ServiceManagementGroup/material,pwistbac/material,BernhardRode/material,Splaktar/material,flowersinthesand/material,SamDLT/material,hodeyp/material,ErinCoughlan/material,Splaktar/material,daniel-nagy/material,acoreyj/material,clshortfuse/material,jelbourn/material,HarrisCorp/material,ilovett/material,DerekLouie/material,HarrisCorp/material,2947721120/angular-material,welkinhealth/material,gkalpak/material,david-gang/material,DerekLouie/material,ErinCoughlan/material,pwistbac/material,bOOm-X/material,angular/material,daniel-nagy/material,j3ski/material,BernhardRode/material,angular/material,david-gang/material,crisbeto/material,gmoothart/material,Splaktar/material,colinskow/material,graingert/material,Frank3K/material,Frank3K/material,bluebirdtech/material,robertmesserle/material