Externalize strings from `/app/views/email_rejection_mailer`

app/views/email_rejection_mailer/rejection.html.haml

 %p
-  Unfortunately, your email message to GitLab could not be processed.
+  = _("Unfortunately, your email message to GitLab could not be processed.")
 
 = markdown @reason
 = render_if_exists 'shared/additional_email_text'

app/views/email_rejection_mailer/rejection.text.haml

-Unfortunately, your email message to GitLab could not be processed.
+= _("Unfortunately, your email message to GitLab could not be processed.")
 \
 = @reason
 = render_if_exists 'shared/additional_email_text'

changelogs/unreleased/gt-externalize-app-views-email_rejection_mailer.yml

+---
+title: Externalize strings from `/app/views/email_rejection_mailer`
+merge_request: 24869
+author: George Tsiolis
+type: other

locale/gitlab.pot

@@ -7677,6 +7677,9 @@ msgstr ""
 msgid "Undo"
 msgstr ""
 
+msgid "Unfortunately, your email message to GitLab could not be processed."
+msgstr ""
+
 msgid "Unlock"
 msgstr ""