doc: documented default statusCode

PR-URL: nodejs#28982
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>

Author: nfearnley

doc/api/http.md

@@ -1404,7 +1404,7 @@ const server = http.createServer((req, res) => {
 added: v0.4.0
 -->
 
-* {number}
+* {number} **Default:** `200`
 
 When using implicit headers (not calling [`response.writeHead()`][] explicitly),
 this property controls the status code that will be sent to the client when