Minor revisions to Jira connection text

Language tweaks to a few of the screens in the Jira Connect app to
resolve some grammar / style issues I noticed. Also updates the
translation list.

app/views/jira_connect/subscriptions/index.html.haml

@@ -39,13 +39,13 @@
       - else
         .gl-text-center
           %h4= s_('Integrations|No linked namespaces')
-          %p= s_('Integrations|Namespaces are your GitLab groups and subgroups that will be linked to this Jira instance.')
+          %p= s_('Integrations|Namespaces are the GitLab groups and subgroups you link to this Jira instance.')
 
   %p.jira-connect-app-body.gl-mt-7.gl-font-base.gl-text-center
     %strong= s_('Integrations|Browser limitations')
     - firefox_link_url = 'https://www.mozilla.org/en-US/firefox/'
     - firefox_link_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: firefox_link_url }
-    = s_('Integrations|Adding a namespace currently works only in browsers that allow cross‑site cookies. Please make sure to use %{firefox_link_start}Firefox%{firefox_link_end} or enable cross‑site cookies in your browser when adding a namespace.').html_safe % { firefox_link_start: firefox_link_start, firefox_link_end: '</a>'.html_safe }
+    = s_('Integrations|Adding a namespace works only in browsers that allow cross‑site cookies. Use %{firefox_link_start}Firefox%{firefox_link_end}, or enable cross‑site cookies in your browser, when adding a namespace.').html_safe % { firefox_link_start: firefox_link_start, firefox_link_end: '</a>'.html_safe }
     = link_to _('Learn more'), 'https://gitlab.com/gitlab-org/gitlab/-/issues/284211', target: '_blank', rel: 'noopener noreferrer'
 
 = webpack_bundle_tag 'performance_bar' if performance_bar_enabled?

app/views/jira_connect/users/show.html.haml

 .jira-connect-users-container.gl-text-center
   - user_link = link_to(current_user.to_reference, user_path(current_user), target: '_blank', rel: 'noopener noreferrer')
-  %h2= _('You are signed into GitLab as %{user_link}').html_safe % { user_link: user_link }
+  %h2= _('You are signed in to GitLab as %{user_link}').html_safe % { user_link: user_link }
 
   %p= s_('Integrations|You can now close this window and return to the GitLab for Jira application.')
 

locale/gitlab.pot

@@ -16622,7 +16622,7 @@ msgstr ""
 msgid "Integrations|Add namespace"
 msgstr ""
 
-msgid "Integrations|Adding a namespace currently works only in browsers that allow cross‑site cookies. Please make sure to use %{firefox_link_start}Firefox%{firefox_link_end} or enable cross‑site cookies in your browser when adding a namespace."
+msgid "Integrations|Adding a namespace works only in browsers that allow cross‑site cookies. Use %{firefox_link_start}Firefox%{firefox_link_end}, or enable cross‑site cookies in your browser, when adding a namespace."
 msgstr ""
 
 msgid "Integrations|All details"
@@ -16682,7 +16682,7 @@ msgstr ""
 msgid "Integrations|Namespace successfully linked"
 msgstr ""
 
-msgid "Integrations|Namespaces are your GitLab groups and subgroups that will be linked to this Jira instance."
+msgid "Integrations|Namespaces are the GitLab groups and subgroups you link to this Jira instance."
 msgstr ""
 
 msgid "Integrations|No available namespaces."
@@ -34770,7 +34770,7 @@ msgstr ""
 msgid "You are receiving this message because you are a GitLab administrator for %{url}."
 msgstr ""
 
-msgid "You are signed into GitLab as %{user_link}"
+msgid "You are signed in to GitLab as %{user_link}"
 msgstr ""
 
 msgid "You are trying to upload something other than an image. Please upload a .png, .jpg, .jpeg, .gif, .bmp, .tiff or .ico."