NLB Instance mode guide referenced the wrong annotation

[TBBle]

Issue

None, noticed while reading the documentation.

Description

Similar to the IP mode, the instance mode is based on the annotation service.beta.kubernetes.io/aws-load-balancer-type value instance.

The annotation that takes an instance value is service.beta.kubernetes.io/aws-load-balancer-nlb-target-type, and this also matches the text we're being "similar to":

NLB IP mode is determined based on the service.beta.kubernetes.io/aws-load-balancer-nlb-target-type annotation.

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 🌟

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Paul "TBBle" Hampson (1efeafb)

[k8s-ci-robot]

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[k8s-ci-robot]

Hi @TBBle. Thanks for your PR.

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[TBBle]

Ooops, my CLA signature is under my work email address. I'll reset the author now.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: kishorj, TBBle

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