Update devtools-postmessage-perf-timeline/index.html

Author: captainbrosset

devtools-postmessage-perf-timeline/index.html

@@ -20,8 +20,7 @@ <h1>postMessage Trace Events demo</h1>
         you to easily investigate when a <code>postMessage</code> call occurred, 
         and how long the message was queued before the <code>postMessage</code> handler started.
     </p>
-        Used by <a href="https://learn.microsoft.com/microsoft-edge/devtools-guide-chromium/evaluate-performance/reference#view-messages-between-windows-iframes-and-dedicated-workers">View messages between windows, iframes, and dedicated workers</a>
-        in <em>Performance features reference</em>.
+        Used by <a href="https://learn.microsoft.com/microsoft-edge/devtools-guide-chromium/evaluate-performance/reference#view-messages-between-windows-iframes-and-dedicated-workers">View messages between windows, iframes, and dedicated workers</a> in <em>Performance features reference</em>.
     </p>
     <b>Main frame:</b>
     <button style="display: block; margin-top: 1.5em ;">Send message to iframe</button>