docs/fix: annotation admonition is broken formatting

[mtulio]

Updated formatting for notes, tips, and examples in the annotations documentation.

Issue

mkdocs not rendering correctly the section for annotation https://kubernetes-sigs.github.io/aws-load-balancer-controller/latest/guide/ingress/annotations/#ipam-ipv4-pool-id :

Description

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[k8s-ci-robot]

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[mtulio]