fix config file name in aws-china.md

[qqshfox]

No description provided.

[mikesplain]

Thanks for the cleanup.

/lgtm
/ok-to-test
/area documentation

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: mikesplain, qqshfox
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[chrislovecnm]

/retest

[k8s-ci-robot]

@qqshfox: The following test failed, say /retest to rerun them all:

Test name	Commit	Details	Rerun command
pull-kops-e2e-kubernetes-aws	8f73d92	link	/test pull-kops-e2e-kubernetes-aws

Full PR test history. Your PR dashboard. Please help us cut down on flakes by linking to an open issue when you hit one in your PR.

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[justinsb]

docs only, has LGTM, test failing due to limited capacity. Force-merging.