add upgrade notices to release notes layout, localized with links

Author: sarahs

data/ui.yml

@@ -18,6 +18,9 @@ header:
       please visit our
       <a id="to-english-doc" href="/en">English documentation</a>.
     early_access: 📣 Please <b>do not share</b> this URL publicly. This page contains content about an early access feature.
+    ghes_release_notes_upgrade_patch_only: 📣 This is not the <a href="#{{ latestPatch }}">latest patch release</a> of Enterprise Server.
+    ghes_release_notes_upgrade_release_only: 📣 This is not the <a href="/enterprise-server@{{ latestRelease }}/admin/release-notes">latest release</a> of Enterprise Server.
+    ghes_release_notes_upgrade_patch_and_release: 📣 This is not the <a href="#{{ latestPatch }}">latest patch release</a> of this release series, and this is not the <a href="/enterprise-server@{{ latestRelease }}/admin/release-notes">latest release</a> of Enterprise Server.
 search:
   need_help: Need help?
   placeholder: Search topics, products...

layouts/release-notes.html

@@ -60,6 +60,18 @@ <h2 class="border-bottom-0 m-0 p-0">
                   </div>
 
                   <p class="text-gray mt-1">{{ patch.date | date: "%B %d, %Y" }}</p>
+
+                  {% if patch.version != latestPatch and allVersions[currentVersion].currentRelease == latestRelease %}
+                  <p class="text-gray mt-1">{% data ui.header.notices.ghes_release_notes_upgrade_patch_only %}</p>
+                  {% endif %}
+
+                  {% if patch.version == latestPatch and allVersions[currentVersion].currentRelease != latestRelease %}
+                  <p class="text-gray mt-1">{% data ui.header.notices.ghes_release_notes_upgrade_release_only %}</p>
+                  {% endif %}
+
+                  {% if patch.version != latestPatch and allVersions[currentVersion].currentRelease != latestRelease %}
+                  <p class="text-gray mt-1">{% data ui.header.notices.ghes_release_notes_upgrade_patch_and_release %}</p>
+                  {% endif %}
                 </header>
 
                 <div class="container-xl px-3">