Update setInnerContent syntax in html-rewriter.mdx

`<code>` doesn't seem to work over multiple lines 

broken during a reformatting refactor?

Author: nelsonjchen

src/content/docs/workers/runtime-apis/html-rewriter.mdx

@@ -169,9 +169,7 @@ The `element` argument, used only in element handlers, is a representation of a
   Element
   - Removes the element and inserts content in place of it.
 
-- <code>
-  	setInnerContent(contentContent, contentOptionsContentOptionsoptional)
-  </code>
+- `setInnerContent(contentContent, contentOptionsContentOptionsoptional)`  
   : Element
   - Replaces content of the element.