minor #3358 Add forgotten closing quotes (Zul3s)

This PR was merged into the 3.0.x-dev branch.

Discussion
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Add forgotten closing quotes

I propose simple small correction : a forgotten closing quotes.

Commits
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adfc195 Add forgotten closing quotes

doc/dashboards.rst

@@ -410,7 +410,7 @@ generator to return the menu items::
         if ('... some complex expression ...') {
             yield MenuItem::section('Blog');
             yield MenuItem::linkToCrud('Categories', 'fa fa-tags', Category::class);
-            yield MenuItem::linkToCrud('Blog Posts', 'fa fa-file-text, BlogPost::class);
+            yield MenuItem::linkToCrud('Blog Posts', 'fa fa-file-text', BlogPost::class);
         }
 
         // ...