UX: rename the word "Upgrade" to "Update" in the UI. (#26396)

In this PR, all references in the UI to the word "`upgrade`" are changed to "`update`". This is to differentiate the update process in self-hosted sites from the plan "upgrade" process in hosted sites.

Follow-up to the PR: https://github.com/discourse/docker_manager/pull/208

app/assets/javascripts/admin/addon/components/version-checks.hbs

@@ -125,17 +125,17 @@
           <span class="normal-note">
             {{i18n "admin.dashboard.updates_available"}}
           </span>
-          {{i18n "admin.dashboard.please_upgrade"}}
+          {{i18n "admin.dashboard.please_update"}}
         {{/if}}
       </div>
     </div>
   {{/if}}
 
   <CustomHtml
-    @name="upgrade-header"
+    @name="update-header"
     @versionCheck={{this.versionCheck}}
     @tagName="div"
-    @classNames="upgrade-header"
+    @classNames="update-header"
   />
 
   <PluginOutlet

app/assets/stylesheets/common/admin/dashboard.scss

@@ -526,7 +526,7 @@
   justify-content: space-between;
   padding-top: 1em;
 
-  .upgrade-header {
+  .update-header {
     flex: 1 1 100%;
 
     @media screen and (max-width: 650px) {

config/locales/client.en.yml

@@ -2037,7 +2037,7 @@ en:
       close: "close"
       dismiss_error: "Dismiss error"
     close: "Close"
-    assets_changed_confirm: "This site just received a software upgrade. Get the latest version now?"
+    assets_changed_confirm: "This site just received a software update. Get the latest version now?"
     logout: "You were logged out."
     refresh: "Refresh"
     home: "Home"
@@ -4843,10 +4843,10 @@ en:
         up_to_date: "You're up to date!"
         critical_available: "A critical update is available."
         updates_available: "Updates are available."
-        please_upgrade: "Please upgrade!"
+        please_update: "Please update!"
         no_check_performed: "A check for updates has not been performed. Ensure Sidekiq is running."
         stale_data: "A check for updates has not been performed lately. Ensure Sidekiq is running."
-        version_check_pending: "Looks like you upgraded recently. Fantastic!"
+        version_check_pending: "Looks like you updated recently. Fantastic!"
         installed_version: "Installed"
         latest_version: "Latest"
         problems_found: "Some advice based on your current site settings"

config/locales/server.en.yml

@@ -3066,7 +3066,7 @@ en:
       Your version: %{installed_version}
       New version: **%{new_version}**
 
-      - Upgrade using our easy **[one-click browser upgrade](%{base_url}/admin/upgrade)**
+      - Update using our easy **[one-click browser update](%{base_url}/admin/update)**
 
       - See what's new in the [release notes](https://meta.discourse.org/tag/release-notes) or view the [raw GitHub changelog](https://github.com/discourse/discourse/commits/main)
 
@@ -3081,7 +3081,7 @@ en:
       Your version: %{installed_version}
       New version: **%{new_version}**
 
-      - Upgrade using our easy **[one-click browser upgrade](%{base_url}/admin/upgrade)**
+      - Update using our easy **[one-click browser update](%{base_url}/admin/update)**
 
       - See what's new in the [release notes](https://meta.discourse.org/tag/release-notes) or view the [raw GitHub changelog](https://github.com/discourse/discourse/commits/main)
 

lib/discourse_updates.rb

@@ -39,7 +39,7 @@ module DiscourseUpdates
             )
 
         # Handle cases when version check data is old so we report something that makes sense
-        if version_info.updated_at.nil? || last_installed_version != Discourse::VERSION::STRING || # never performed a version check # upgraded since the last version check
+        if version_info.updated_at.nil? || last_installed_version != Discourse::VERSION::STRING || # never performed a version check # updated since the last version check
              is_stale_data
           Jobs.enqueue(:call_discourse_hub, all_sites: true)
           version_info.version_check_pending = true