Update kubecon-us-2024.md with Microcks kiosk slots

[yada]

Adding Microcks kiosk slots to enhance community interaction, providing a space for users to connect, share ideas, and collaborate in real-time.

[github-actions]

Action Required

You are adding or updating English content so please take the following actions for other languages.

• If you update content, that has corresponding files in other languages, include a note suggesting that users check the English page for the most recent updates in those translated pages.
• If you add new content under website/content/en there is nothing you need to do.

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