Merge pull request #1069 from jjmerri/patch-3

add body param

Author: oleiade

src/data/markdown/docs/20 jslib/01 jslib/01 aws/SignatureV4/01 sign().md

@@ -17,6 +17,7 @@ The first parameter of the `sign` method consists of an Object with the followin
 | hostname      | string                   | The hostname the request is sent to                                                                                                                                                                                                                                     |
 | path          | string                   | The path of the request                                                                                                                                                                                                                                                 |
 | headers       | Object                   | The headers of the HTTP request                                                                                                                                                                                                                                         |
+| body?         | string or ArrayBuffer    | The optional body of the HTTP request                                                                                                                                                                                                                                   |
 | uriEscapePath | boolean                  | Whether to uri-escape the request URI path as part of computing the canonical request string. This is required for every AWS service, except Amazon S3, as of late 2017.                                                                                                |
 | applyChecksum | boolean                  | Whether to calculate a checksum of the request body and include it as either a request header (when signing) or as a query string parameter (when pre-signing). This is required for AWS Glacier and Amazon S3 and optional for every other AWS service as of late 2017. |
 |               |                          |                                                                                                                                                                                                                                                                         |
@@ -148,4 +149,4 @@ export default function () {
 }
 ```
 
-</CodeGroup>
+</CodeGroup>