DOCS: Add example of visualizing JSON profile on Chromium

Remove --dump=raw, since it isn't really supported

Resolves #12212

Closes #12234.

PiperOrigin-RevId: 337083799

site/docs/user-manual.html

diff --git a/site/docs/user-manual.html b/site/docs/user-manual.html
index 82bd6ea..1f4e261 100644
--- a/site/docs/user-manual.html
+++ b/site/docs/user-manual.html
@@ -2646,10 +2646,9 @@
   The following options are supported:
 </p>
 <ul>
-  <li><code id='flag--dump'>--dump=text</code> displays all gathered data in a
-  <a href='guide.html#dump-text-format'>human-readable format</a></li>
-  <li><code>--dump=raw</code> displays all gathered data in a
-  <a href='guide.html#dump-raw-format'>script-friendly format</a></li>
+  <li><code id='flag--dump'>--dump</code> displays all gathered data in a
+  <a href='guide.html#dump-text-format'>human-readable format</a>. However,
+  this it does not support other formats yet.</li>
 </ul>
 
 <p>