Update articles/components/tree-grid/index.adoc

Co-authored-by: Sascha Ißbrücker <[email protected]>

Author: ugur-vaadin

articles/components/tree-grid/index.adoc

@@ -146,8 +146,8 @@ include::{root}/src/main/java/com/vaadin/demo/component/treegrid/TreeGridScrollT
 
 `TreeDataProvider` supports this feature out of the box. For other data providers, you need to override and implement the following methods of [classname]`HierarchicalDataProvider`:
 
-- [methodname]#getParent(T item)#
-- [methodname]#getItemIndex(T item, HierarchicalQuery query)#
+- [methodname]`getParent(T item)`
+- [methodname]`getItemIndex(T item, HierarchicalQuery query)`
 
 === Scrolling to an Item by Path