(minor) update agent-sessions page to use consistent section headings

[julienbonastre]

Code of Conduct

• I have read and agree to the GitHub Docs project's Code of Conduct

What article on docs.github.com is affected?

https://docs.github.com/en/copilot/how-tos/github-copilot-app/agent-sessions#using-the-rubber-duck-agent

What part(s) of the article would you like to see updated?

https://docs.github.com/en/copilot/how-tos/github-copilot-app/agent-sessions#using-the-rubber-duck-agent
Adjacent "skills" or commands are formatted with their /slash-command format in their headings, but rubber duck is not?

Additional information

[welcome]

Thanks for opening this issue. A GitHub docs team member should be by to give feedback soon. In the meantime, please check out the contributing guidelines.

[hubwriter]

I disagree.

If we're talking about the agent it's "rubber duck", the slash command is /rubber-duck.

[subatoi]

Closing per comment #45755 (comment)