[fix] http/api/set_keyval example

Author: xeioex

README.rst

@@ -1208,7 +1208,7 @@ example.js:
     async function set_keyval(r) {
         let method = r.args.method ? r.args.method : 'POST';
         let res = await r.subrequest('/api/7/http/keyvals/foo',
-                                     { method, r.requestBody});
+                                     { method, body: r.requestBody});
 
         if (res.status >= 300) {
             r.return(res.status, res.responseBody);

njs/http/api/set_keyval.js

@@ -1,7 +1,7 @@
 async function set_keyval(r) {
     let method = r.args.method ? r.args.method : 'POST'; 
     let res = await r.subrequest('/api/7/http/keyvals/foo',
-                                 { method, r.requestBody});
+                                 { method, body: r.requestBody});
 
     if (res.status >= 300) {
         r.return(res.status, res.responseBody);