docs: add latest version content (angular#43964)

Add the update to latest version content for version 13.  Add redirect for latest version content.  Update toc for later version content.

PR Close angular#43964

.pullapprove.yml

@@ -991,7 +991,8 @@ groups:
           'aio/content/guide/migration-localize.md',
           'aio/content/guide/migration-module-with-providers.md',
           'aio/content/guide/static-query-migration.md',
-          'aio/content/guide/updating-to-version-12.md',
+          'aio/content/guide/updating-to-version-13.md',
+          'aio/content/guide/update-to-latest-version.md',
           'aio/content/guide/ivy-compatibility.md',
           'aio/content/guide/ivy-compatibility-examples.md'
           ])

aio/content/guide/update-to-latest-version.md

@@ -0,0 +1,41 @@
+# Update Angular
+
+This guide contains information to update to Angular version 13.
+
+## Update Angular CLI applications
+
+For step-by-step instructions on how to update to the latest Angular release and leverage the Angular automated migration tools, use the interactive update guide at [update.angular.io][AngularUpdateMain].
+
+## Changes and deprecations in version 13
+
+<div class="alert is-helpful">
+
+For information about the deprecation and removal practices of Angular, see [Angular Release Practices][AioGuideReleasesDeprecationPractices].
+
+</div>
+
+*   <!--todo: add content from ng team -->
+
+### Breaking changes in Angular version 13
+
+{@a breaking-changes}
+
+*   <!--todo: add content from ng team -->
+
+### New deprecations
+
+{@a deprecations}
+
+*   <!--todo: add content from ng team -->
+
+<!-- links -->
+
+[AioGuideReleasesDeprecationPractices]: guide/releases#deprecation-practices "Deprecation practices - Angular versioning and releases | Angular"
+
+<!-- external links -->
+
+[AngularUpdateMain]: https://update.angular.io " Angular Update Guide | Angular"
+
+<!-- end links -->
+
+@reviewed 2021-10-27

aio/content/navigation.json

@@ -765,18 +765,13 @@
           "tooltip": "Browser support and polyfills guide."
         },
         {
-          "title": "Updating to Version 12",
-          "tooltip": "Support for updating your application from version 11 to 12.",
+          "title": "Update to Version 13",
+          "tooltip": "Support to update your application to version 13",
           "children": [
             {
-              "url": "guide/updating-to-version-12",
+              "url": "guide/update-to-latest-version",
               "title": "Overview",
-              "tooltip": "Everything you need to know for updating your application from version 11 to 12."
-            },
-            {
-              "url": "guide/migration-legacy-message-id",
-              "title": "Migration: Legacy Localization IDs",
-              "tooltip": "Learn how to migrate legacy IDs for localization to new, more stable ones."
+              "tooltip": "Everything you need to know to update your application to version 13"
             }
           ]
         },

aio/firebase.json

@@ -77,6 +77,8 @@
       {"type": 301, "source": "/guide/displaying-data", "destination": "/start#template-syntax"},
       {"type": 301, "source": "/guide/updating-to-version-10", "destination": "https://v10.angular.io/guide/updating-to-version-10"},
       {"type": 301, "source": "/guide/updating-to-version-11", "destination": "https://v11.angular.io/guide/updating-to-version-11"},
+      {"type": 301, "source": "/guide/updating-to-version-12", "destination": "/guide/update-to-latest-version"},
+
 
       // Renaming of Getting Started topics
       {"type": 301, "source": "/start/data", "destination": "/start/start-data"},