Update fetch.bs

Co-authored-by: Domenic Denicola <[email protected]>

fetch.bs

@@ -8414,7 +8414,7 @@ Web IDL, for which every object that implements an <a>interface</a> has a
 <a>relevant settings object</a> you can use. For example, a <a for=/>request</a> associated with a
 DOM <a for=/>element</a> would set the <a for=/>request</a>'s <a for=request>client</a> to the
 element's <a>node document</a>'s <a>relevant settings object</a>. All features that are directly
-web-exposed by JavaScript, HTML, CSS, or other <code>Document</code> subresources should have A
+web-exposed by JavaScript, HTML, CSS, or other {{Document}} subresources should have a
 <a for=request>client</a>.
 
 <p>If your <a for=/>fetching</a> is not directly web-exposed, e.g. it is sent in the background