Update aws-iam-authenticator GIT_TAG

[xdu31]

Issue #, if available:

Description of changes:
Update aws-iam-authenticator GIT_TAG

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[eks-distro-bot]

@xdu31: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
aws-iam-authenticator-1-25-presubmit	d6db817	link	true	/test aws-iam-authenticator-1-25-presubmit

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[zafs23]

/lgtm

[xdu31]

/approve

[eks-distro-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: xdu31

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