Update UI text for artifacts expiration setting

Simplify the settings text.

Changelog: changed

app/views/admin/application_settings/_ci_cd.html.haml

@@ -41,7 +41,7 @@
       = f.label :default_artifacts_expire_in, _('Default artifacts expiration'), class: 'label-bold'
       = f.text_field :default_artifacts_expire_in, class: 'form-control gl-form-input'
       .form-text.text-muted
-        = html_escape(_("The default expiration time for job artifacts. 0 for unlimited. The default unit is in seconds, but you can use other units, for example %{code_open}4 mins 2 sec%{code_close}, %{code_open}2h42min%{code_close}.")) % { code_open: '<code>'.html_safe, code_close: '</code>'.html_safe }
+        = html_escape(_("Set the default expiration time for job artifacts in all projects. Set to %{code_open}0%{code_close} to never expire artifacts by default. If no unit is written, it defaults to seconds. For example, these are all equivalent: %{code_open}3600%{code_close}, %{code_open}60 minutes%{code_close}, or %{code_open}one hour%{code_close}.")) % { code_open: '<code>'.html_safe, code_close: '</code>'.html_safe }
         = link_to _('Learn more.'), help_page_path('user/admin_area/settings/continuous_integration', anchor: 'default-artifacts-expiration')
     .form-group
       .form-check

locale/gitlab.pot

@@ -30659,6 +30659,9 @@ msgstr ""
 msgid "Set the default branch for this project. All merge requests and commits are made against this branch unless you specify a different one."
 msgstr ""
 
+msgid "Set the default expiration time for job artifacts in all projects. Set to %{code_open}0%{code_close} to never expire artifacts by default. If no unit is written, it defaults to seconds. For example, these are all equivalent: %{code_open}3600%{code_close}, %{code_open}60 minutes%{code_close}, or %{code_open}one hour%{code_close}."
+msgstr ""
+
 msgid "Set the due date to %{due_date}."
 msgstr ""
 
@@ -33331,9 +33334,6 @@ msgstr ""
 msgid "The default branch for this project has been changed. Please update your bookmarks."
 msgstr ""
 
-msgid "The default expiration time for job artifacts. 0 for unlimited. The default unit is in seconds, but you can use other units, for example %{code_open}4 mins 2 sec%{code_close}, %{code_open}2h42min%{code_close}."
-msgstr ""
-
 msgid "The dependency list details information about the components used within your project."
 msgstr ""