Document some client-side commands

Add simple documentation for --version

PiperOrigin-RevId: 266152039
diff --git a/site/docs/user-manual.html b/site/docs/user-manual.html
index cddc5b6..741ef6a 100644
--- a/site/docs/user-manual.html
+++ b/site/docs/user-manual.html
@@ -2424,6 +2424,13 @@
   </li>
 </ul>
 
+<h3 id='--version'><code>bazel --version</code></h3>
+<p>
+  <code>bazel --version</code>, with no other args, will emit the same output as
+  <code>bazel version --gnu_format</code>, except without the side-effect of potentially starting
+  a Bazel server.
+</p>
+
 <h3 id='mobile-install'>The <code>mobile-install</code> command</h3>
 <p>
   The <code>mobile-install</code> command installs apps to mobile devices.