update premium support description (#1187)
update premium support description (#1187)

updated to more accurately reflect how it's written in contracts - 24/7 and 1 hour is only guaranteed for critical support issues, not all issues.  standard issues have 7am-7pm coverage and 3 hour response.
sandrinodimattia/docs,hamzawi06/docs,jeffreylees/docs,yvonnewilson/docs,sandrinodimattia/docs,hamzawi06/docs,Catografix/docs,Catografix/docs,Catografix/docs,auth0/docs,hamzawi06/docs,Annyv2/docs,auth0/docs,jeffreylees/docs,khorne3/docs,Annyv2/docs,sandrinodimattia/docs,yvonnewilson/docs,khorne3/docs,auth0/docs,jeffreylees/docs,yvonnewilson/docs,khorne3/docs,Annyv2/docs