Update reusable-markdown.mdx

Author: Ryan-Amirthan

fern/products/docs/pages/component-library/custom-components/reusable-markdown.mdx

@@ -38,7 +38,7 @@ To use a snippet in your documentation, reference it by its file path (including
         ```jsx
         Peace lilies are easy to grow and relatively trouble-free.
 
-        <Markdown src="/snippets/peace-lily.mdx">
+        <Markdown src="/snippets/peace-lily.mdx \/">
         ```
 
     </Tab>
@@ -47,4 +47,4 @@ To use a snippet in your documentation, reference it by its file path (including
 
         <Markdown src="/snippets/peace-lily.mdx" />
     </Tab>
-</Tabs>
+</Tabs>