chore(demo): add note to ng-add installation (#8877)

projects/demo/src/modules/app/home/home.template.html

@@ -33,6 +33,18 @@ <h2>Automatic install Taiga UI (recommended)</h2>
         [code]="nxAdd"
     />
 
+    <tui-notification class="tui-space_top-5">
+        <span>
+            <strong>Note:</strong>
+            If you want to add Taiga UI to a project that is not using the latest major version of Angular, make sure to
+            install the appropriate version of
+            <code>&#64;angular/cdk</code>
+            and
+            <code>&#64;angular/animations</code>
+            first to prevent dependency conflicts.
+        </span>
+    </tui-notification>
+
     <h2 class="tui-space_top-10">Manual</h2>
     <p class="tui-space_top-2">Use this guide to install Taiga UI manually:</p>