one more tiny typo

Author: guineveresaenger

docs/getting-started/index.html

@@ -872,7 +872,7 @@ <h3 id="_pgo_user">pgo user</h3>
 </div>
 <div class="literalblock">
 <div class="content">
-<pre>pgo createa user sally --selector=name=mycluster</pre>
+<pre>pgo create user sally --selector=name=mycluster</pre>
 </div>
 </div>
 <div class="paragraph">