Fix grammar error

fetch.bs

@@ -2018,7 +2018,7 @@ known as an <dfn export id=concept-aborted-network-error>aborted network error</
 <a for=response>body</a> is always null.
 
 <p>To <dfn for="network error" lt="create|creating">create</dfn> a <a>network error</a> given
-<a for=/>fetch params</a> <var>fetchParams</a>, return a new <a>network error</a> with its
+<a for=/>fetch params</a> <var>fetchParams</var>, return a new <a>network error</a> with its
 <a for=response>timing info</a> set to the result of <a>creating an opaque timing info</a> with
 <var>fetchParams</var>'s <a for="fetch params">timing info</a>, and its
 <a for=response>URL list</a> set to a <a for=/>list</a> containing <var>fetchParams</var>'s