Update recommended IAM policy

[mikutas]

What type of PR is this?

/kind documentation

What this PR does / why we need it:

Remove unnecessary permission from README

https://github.com/kubernetes/autoscaler/releases/tag/cluster-autoscaler-1.25.0

Which issue(s) this PR fixes:

Fixes #6129

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

Hi @mikutas. Thanks for your PR.

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[Shubham82]

/ok-to-test

[Shubham82]

Mention under the AWS of Cluster Autoscaler 1.25.0 Chngelog

DescribeAutoScalingGroups now supports directly including tag filers, which results in less API calls to AWS. Users of the AWS Cloudprovider may want to update their IAM roles to remove the DescribeTags action as this is no longer used

/lgtm
Thanks!

[Shubham82]

Hi, @drmorr0 @gjtempleton
could you please approve this PR, so that it will be merged

Thanks!

[gjtempleton]

Thanks for this
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: gjtempleton, mikutas

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