feature #19266 [Mailer] Updated webhook support in Mailer bridge overview for 6.4 (TimoBakx)

This PR was merged into the 6.4 branch.

Discussion
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[Mailer] Updated webhook support in Mailer bridge overview for 6.4

Followup of #19263, as SendGrid webhook support was added in 6.4

Commits
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d4b3b33 [Mailer] Updated webhook support in Mailer bridge overview for 6.4

Author: OskarStark

mailer.rst

@@ -114,7 +114,7 @@ Service               Install with                                    Webhook su
 `Mandrill`_           ``composer require symfony/mailchimp-mailer``
 `Postmark`_           ``composer require symfony/postmark-mailer``    yes
 `Scaleway`_           ``composer require symfony/scaleway-mailer``
-`SendGrid`_           ``composer require symfony/sendgrid-mailer``
+`SendGrid`_           ``composer require symfony/sendgrid-mailer``    yes
 ===================== =============================================== ===============
 
 .. versionadded:: 6.2