Update 16/umbraco-cms/customizing/extending-overview/extension-types/README.md

Author: eshanrnh

16/umbraco-cms/customizing/extending-overview/extension-types/README.md

@@ -87,8 +87,7 @@ The `section` extension type is used to place top-level navigation items within
 
 ### [Trees](tree.md)
 
-The `tree` extension type is used to create a hierarchical structure composed of nodes, such as documents or media extensions or toolbar extensions.
-items.
+The `tree` extension type is used to create a hierarchical structure composed of nodes, such as documents, media extensions, or toolbar extensions.
 
 ### [Workspaces](workspaces/README.md)