fix typo

modules.html

@@ -572,7 +572,7 @@ JSON data that can be useful for inventory purposes.</p>
 <p>Playbooks do not actually use this module, they use the <a class="reference internal" href="#setup"><em>setup</em></a>
 module behind the scenes.</p>
 <p>Example from /usr/bin/ansible:</p>
-<div class="highlight-python"><pre>ansible foo.example.org -m ohai</pre>
+<div class="highlight-python"><pre>ansible foo.example.org -m facter</pre>
 </div>
 </div>
 <div class="section" id="fetch">

rst/modules.rst

@@ -253,7 +253,7 @@ module behind the scenes.
 
 Example from /usr/bin/ansible::
 
-    ansible foo.example.org -m ohai
+    ansible foo.example.org -m facter
 
 .. _fetch: