🐛 fix OAS test (#7535)

Author: odeimaiz

services/director-v2/openapi.json

@@ -66,7 +66,7 @@
           "computations"
         ],
         "summary": "Create Computation",
-        "description": "Create and optionally starts it",
+        "description": "Create and optionally start a new computation",
         "operationId": "create_computation_v2_computations_post",
         "requestBody": {
           "content": {

services/web/server/src/simcore_service_webserver/api/v0/openapi.yaml

@@ -8582,6 +8582,7 @@ components:
           type: array
           uniqueItems: true
           title: Subgraph
+          default: []
       type: object
       title: ComputationStart
     ComputationStarted:
@@ -8597,6 +8598,7 @@ components:
           type: array
           title: Ref Ids
           description: Checkpoints IDs for created pipeline
+          default: []
       type: object
       required:
       - pipeline_id