changed link to KB to point to Classroom
changed link to KB to point to Classroom

Updated a link that pointed to:
https://support.sendgrid.com/hc/en-us/articles/200181948-Adding-an-additional-dedicated-IP-to-your-account
to point to:
https://sendgrid.com/docs/Classroom/Basics/Account/adding_an_additional_dedicated_ip_to_your_account.html
katieporter/docs,Aonepathan/docs,ksigler7/docs,ksigler7/docs,ksigler7/docs,Whatthefoxsays/docs,sendgrid/docs,Aonepathan/docs,Aonepathan/docs,hardikjain29/docs,sendgrid/docs,Whatthefoxsays/docs,hardikjain29/docs,hardikjain29/docs,jacobmovingfwd/docs,katieporter/docs,sendgrid/docs,Aonepathan/docs,Zaftula/docs,katieporter/docs,hardikjain29/docs,jacobmovingfwd/docs,jacobmovingfwd/docs,jacobmovingfwd/docs,Zaftula/docs,katieporter/docs,Zaftula/docs,Whatthefoxsays/docs,Zaftula/docs,jacobmovingfwd/docs,hardikjain29/docs,Aonepathan/docs,katieporter/docs,Zaftula/docs