Update index.bs

Co-authored-by: Kagami Sascha Rosylight <[email protected]>

Author: youennf

index.bs

@@ -1556,7 +1556,7 @@ the following table:
 
  <dt><code><var ignore>controller</var>.{{ReadableStreamDefaultController/enqueue()|enqueue}}(|chunk|, |options|)</code>
  <dd>
-  <p>Enqueues the given [=chunk=] <var ignore>chunk</var> in the controlled readable stream,
+  <p>Enqueues the given [=chunk=] |chunk| in the controlled readable stream,
     with <var ignore>options</var>.
 
  <dt><code><var ignore>controller</var>.{{ReadableStreamDefaultController/error()|error}}(<var ignore>e</var>)</code>