[BUG] OpenAI agents training example code is using wrong dynamic module name for workflows.

[HwVanICI]

Checklist

• The error occurs when using our provided Docker image.
• I can consistently reproduce the bug across multiple trials or random seeds.
• If the error causes experiment abortion, I've verified that this error is the root
  cause, not a secondary error caused by peer workers.

Detailed Information

Describe the bug

In the OpenAI agents example training code, the workflow module names passed to trainer.tain() have wrong paths.

• "workflow" argument passed "examples.openai_agents.train_agents.OpenAIAgentWorkflow" module name, but the "openai_agents" folder name should be replaced as "openai-agents".
• "eval_workflow" argument passed "examples.openai_agents.train_agents.OpenAIAgentWorkflow" module name, but the "openai_agents" folder name should be replaced as "openai-agents".

Expected behavior

We want to:

1. replace the "workflow" module name to "examples.openai-agents.train_agents.OpenAIAgentWorkflow".
2. replace the "eval_workflow" module name to "examples.openai-agents.train_agents.OpenAIAgentWorkflow".