fix doc
This closes
<li>put</li>
</ul>
</li>
- <li>body; contains a string representing JSON, XML, etc. to be sent with any
+ <li>request.body; contains a string representing JSON, XML, etc. to be sent with any
of those methods except for "get".</li>
<li>mime.type; specifies media type of the request body, required when 'body' is passed.</li>
<li>*; any other keys can be configured to pass variables to resolve target URLs. See 'Dynamic URLs' section below.</li>
