Update OpenAPI specs

This update comes directly from primary source repo

Private OpenAPI repo SHA: a63ef024fb3bb24893598ed7a617f2727a277396

Primary source repo SHA: c229c489df850e5748b7884a0c83387d94bdc31d

Author: actions-user

source_specs/client_rest.yaml

@@ -6098,6 +6098,8 @@ components:
     AgentRunCreate:
       description: Payload for creating a run.
       type: object
+      required:
+        - agent_id
       properties:
         agent_id:
           type: string