Update group-by-v2.md

site/docs/extensions/group-by-v2.md

@@ -69,7 +69,7 @@ toc: true
 
 - **Detail:**
 
-   Set `true` to allow collapse/expand groups
+   Set `true` to allow collapse/expand groups.
 
 - **Default:** `false`
 
@@ -83,4 +83,4 @@ toc: true
 
    Set `true` to show icons if the group is collapsed or expanded (see groupByToggle).
 
-- **Default:** `false`
+- **Default:** `false`