Add text stating a primary email address must be used

app/views/devise/passwords/new.html.haml

@@ -6,6 +6,7 @@
       .form-group
         = f.label :email
         = f.email_field :email, class: "form-control gl-form-input", required: true, value: params[:user_email], autofocus: true, title: _('Please provide a valid email address.')
+        = _('Must be the primary email address of the GitLab account')
       .clearfix
         = f.submit _("Reset password"), class: "gl-button btn-confirm btn"
 

locale/gitlab.pot

@@ -21639,6 +21639,9 @@ msgstr ""
 msgid "Multiple uploaders found: %{uploader_types}"
 msgstr ""
 
+msgid "Must be the primary email address of the GitLab account"
+msgstr ""
+
 msgid "Must have a unique policy, status, and elapsed time"
 msgstr ""