fix(rest): fix assertion broken by new deps versions

Update the expected YAML version of OpenAPI spec generated by the
server to match the output of the current version of the libraries
we use under the hood.

Author: bajtos

packages/rest/test/integration/rest-server.integration.ts

@@ -155,8 +155,6 @@ paths:
       '/openapi.yaml',
     );
     expect(response.text).to.eql(`openapi: 3.0.0
-servers:
-  - url: /
 info:
   title: LoopBack Application
   version: 1.0.0
@@ -170,6 +168,8 @@ paths:
             '*/*':
               schema:
                 type: string
+servers:
+  - url: /
 `);
     expect(response.get('Access-Control-Allow-Origin')).to.equal('*');
     expect(response.get('Access-Control-Allow-Credentials')).to.equal('true');