Fix missing link on outgoing new release notifications (#29079) (#29300)

Backport #29079

Signed-off-by: Wiktor Kwapisiewicz <wiktor@metacode.biz>
Co-authored-by: Wiktor Kwapisiewicz <wiktor@metacode.biz>
Co-authored-by: KN4CK3R <admin@oldschoolhack.me>

services/mailer/mail_release.go

@@ -74,6 +74,7 @@ func mailNewRelease(ctx context.Context, lang string, tos []string, rel *repo_mo
 		"Release":  rel,
 		"Subject":  subject,
 		"Language": locale.Language(),
+		"Link":     rel.HTMLURL(),
 	}
 
 	var mailBody bytes.Buffer