Indicate the WG test suite doc is out of date. (#247)

Author: benjie

working-group/test-suite.md

@@ -1,3 +1,5 @@
+🚨 **WARNING** 🚨 This proposed test suite is out of date and does not reflect the current status of the spec. For a more up to date test suite, please see [graphql-http audits](https://github.com/graphql/graphql-http#audits) or the testing tool at [graphql-http.com](https://graphql-http.com/). This document only exists for historical reasons.
+
 # Automated Test Suite
 
 > These are the descriptions of the tests that we intend to build. This document is a scaffold until we have the tests implemented. At that point, the code itself will become the documentation and this document will be removed.
@@ -55,4 +57,4 @@ A syntax error in the query MUST result in either a 200 and a body with an  `err
 * Send a GraphQL query with a valid structured request, but an invalid GraphQL query document. Include an `Accept: application/graphql-json` to ensure we receive JSON-encoded body.
   * **ERROR** Assert that either
     * The server responds with a 200 HTTP response and a JSON document containing a non-null `errors` top level attribute; OR
-    * The server responds with a 400 HTTP response
+    * The server responds with a 400 HTTP response