Improve UI text of group settings page

Changelog: changed

app/views/groups/settings/_general.html.haml

@@ -16,9 +16,8 @@
 
     .row.gl-mt-3
       .form-group.col-md-9
-        = f.label :description, s_('Groups|Group description'), class: 'label-bold'
+        = f.label :description, s_('Groups|Group description (optional)'), class: 'label-bold'
         = f.text_area :description, class: 'form-control', rows: 3, maxlength: 250
-        .form-text.text-muted= s_('Groups|Optional group description.')
 
   = render 'shared/repository_size_limit_setting_registration_features_cta', form: f
   = render_if_exists 'shared/repository_size_limit_setting', form: f, type: :group

locale/gitlab.pot

@@ -17689,7 +17689,7 @@ msgstr ""
 msgid "Groups|Group avatar"
 msgstr ""
 
-msgid "Groups|Group description"
+msgid "Groups|Group description (optional)"
 msgstr ""
 
 msgid "Groups|Group name"
@@ -17707,9 +17707,6 @@ msgstr ""
 msgid "Groups|Must start with letter, digit, emoji, or underscore. Can also contain periods, dashes, spaces, and parentheses."
 msgstr ""
 
-msgid "Groups|Optional group description."
-msgstr ""
-
 msgid "Groups|Remove avatar"
 msgstr ""