[DOCS] Missing link in Tree View documentation

Finally done, it took me the whole week to get it right.

Signed-off-by: Eudes Petonnet-Vincent <[email protected]>

src/website/src/app/documentation/demos/tree-view/tree-view.demo.html

@@ -283,6 +283,7 @@ <h3 id="examples">Code &amp; Examples</h3>
                         <li><a routerLink="." fragment="dynamically-generated">Generating A tree dynamically</a></li>
                         <li><a routerLink="." fragment="checkbox-tree">Checkbox tree</a></li>
                         <li><a routerLink="." fragment="boolean-selection">Binding selection to a boolean</a></li>
+                        <li><a routerLink="." fragment="recursive-tree">Recursive tree</a></li>
                         <li><a routerLink="." fragment="lazy-loading">Lazy loading children</a></li>
                         <li><a routerLink="." fragment="lazy-loading-selection">Lazy loading and selection</a></li>
                         <li><a routerLink="." fragment="lazy-loading-recursive">Lazy-loading recursive trees</a></li>