[API] Adiciona link a documentação

Api/Competition.yaml

@@ -5,9 +5,6 @@ info:
   description: >-
     Api of the competition. This API should be used by the competition
     application to perform assessments
-  contact:
-    name: Documentation
-    url: 'https://gitlab.dev.evologica.com.br/Competify/Docs'
   license:
     name: Apache 2.0
     url: 'https://www.apache.org/licenses/LICENSE-2.0.html'
@@ -794,3 +791,6 @@ components:
       type: http
       scheme: bearer
       bearerFormat: JWT
+externalDocs:
+  description: Gitlab documentation
+  url: 'https://gitlab.dev.evologica.com.br/Competify/Docs'