Add LTS updates section (#2984)

* Add Latest LTS Update section to homepage

* Update LTS Update section to feature Integrated help

* Update docs/index.md

Co-authored-by: Tomasz Dąbrowski <64841871+dabrt@users.noreply.github.com>

---------

Co-authored-by: Tomasz Dąbrowski <64841871+dabrt@users.noreply.github.com>

Author: mnocon

docs/index.md

@@ -72,7 +72,7 @@
         </div>
     </div>
     <div class="row notifications">
-        <div class="col-12 col-lg-12">
+        <div class="col-12 col-lg-6">
             <div class="notification notification--latest-release" id="tile2">
                 <div class="notification__content">
                     <h2>The latest Ibexa DXP is v5.0 LTS</h2>
@@ -86,6 +86,21 @@
                 </div>
             </div>
         </div>
+        <div class="col-12 col-lg-6">
+            <div class="notification notification--lts-update" id="tile3">
+                <div class="notification__content">
+                    <h2>The newest LTS Update is Integrated help</h2>
+                    <div>Access contextual documentation, guidance, and resources right from the user interface.</div>
+                </div>
+                <div class="notification__cta">
+                    <a href="administration/back_office/integrated_help">Learn more about this LTS Update</a>
+                    <a href="ibexa_products/editions#lts-updates">Discover other LTS Updates</a>
+                </div>
+                <div class="notification__image">
+                    <img src="images/notification-lts-update.svg" alt="LTS Update" />
+                </div>
+            </div>
+        </div>
     </div>
     <div class="row">
         <div class="col-12">