revert event name

GitOrigin-RevId: 0dac1806e662ac8450fa26642dd76a9a485f6dbb

services/web/frontend/js/features/outline/components/documentation-button.tsx

@@ -25,7 +25,7 @@ function DocumentationButton() {
   )
 
   function handleCloseClick() {
-    sendMB('file-tree-documentation-dismiss ')
+    sendMB('file-tree-documentation-click')
 
     setShowDocumentationButton(false)
   }