oas: [15/n] improve oas schemas (#9216)

Improve OAS schemas [15/n]

Note: validation error will be fixed once #9218 is merged

www/utils/generated/oas-output/schemas/AdminWorkflowExecutionResponse.ts

@@ -1,7 +1,7 @@
 /**
  * @schema AdminWorkflowExecutionResponse
  * type: object
- * description: SUMMARY
+ * description: The workflow execution's details.
  * x-schemaName: AdminWorkflowExecutionResponse
  * required:
  *   - workflow_execution