Fix playground example (#1928)

VitorLuizC · web-flow · commit 4b514e1a944f · 2022-02-02T18:32:57.000+01:00
Reviewed-by: Titus Wormer &lt;tituswormer@gmail.com&gt;
diff --git a/docs/playground.server.mdx b/docs/playground.server.mdx
@@ -13,7 +13,8 @@ export const playgroundSource = `Hello, world!
 Below is an example of markdown in JSX.
 
 <div style={{padding: '1rem', backgroundColor: 'violet'}}>
-Try and change the background color to \`tomato\`.`
+  Try and change the background color to \`tomato\`.
+</div>`
 
 # Playground
 
