Update email_activity_beta.md
Update email_activity_beta.md
ksigler7/docs,katieporter/docs,ksigler7/docs,katieporter/docs,Whatthefoxsays/docs,Whatthefoxsays/docs,katieporter/docs,katieporter/docs,sendgrid/docs,sendgrid/docs,sendgrid/docs,katieporter/docs,Whatthefoxsays/docs,ksigler7/docs