fix(tag-app-delivery): adjust tech leads to admin

[GenPage]

Sarah and I are the current tech leads for TAG app delivery and need admin to merge PRs

[clowarden[bot]]

Validation succeeded

✅ The proposed configuration changes are valid!

Configuration changes

Github

• user schristoff role in repository tag-app-delivery has been updated to admin
• user GenPage role in repository tag-app-delivery has been updated to admin

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🔸 Please review the changes detected as they will be applied immediately once this PR is merged 🔸

[GenPage]

Link: https://github.com/cncf/tag-app-delivery?tab=readme-ov-file#leads

@huats @mrbobbytables not sure who to tag for review, my apologies.

[GenPage]

Forgot about the KubeCon freeze folks, apologies. No rush here.