Update readme.md

Author: patrick-rodgers

samples/file-picking/example-picker-configs/readme.md

@@ -10,3 +10,4 @@ For most examples the minimal required configuration is shown illustrating the g
 [sharepoint-pages](./sharepoint-pages.json)|Configuration to load SharePoint pages using a filter and paths to the SitePages library|
 [enable-search](./enable-search.json)|Shows how to enabled the search box within the picker|
 [saveas-dialog](./saveas-dialog.json)|Configures the picker to act as a Save-As dialog selecting a file and showing a filename box|
+[folder-path](./folder-path.json)|Shows how to select a folder for display in the picker|