[Sendgrid] - Doc update for new Sendgrid send email Action

[joe-ayoub-segment]

Proposed changes

Doc update for new Sendgrid send email Action
ALSO: Renaming Destination from SendGrid Marketing Campaigns to simply SendGrid.

Merge timing

Please do not deploy until notified to do so on this ticket.

Related issues (optional)

[joe-ayoub-segment]

hi @forstisabella and @smultani -
we're renaming the 'SendGrid Marketing Campaigns' Destination to 'SendGrid'. I've updated the doc accordingly in this PR.

@forstisabella - I'm not across any other potential changes to docs which might need to happen. Are you familiar with what needs to be done?

[forstisabella]

hi @forstisabella and @smultani - we're renaming the 'SendGrid Marketing Campaigns' Destination to 'SendGrid'. I've updated the doc accordingly in this PR.

@forstisabella - I'm not across any other potential changes to docs which might need to happen. Are you familiar with what needs to be done?

I'll update the title to reflect that it's just SendGrid, and when we update the docs catalog, it'll update across the rest of the site - we should be g2g after that.

I'll do one more editing pass and I think we'll be ready to release this one!