Fix typos in customresourcestate-metrics doc

[timp87]

No description provided.

[linux-foundation-easycla]

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• ✅ login: timp87 / name: Pavel Timofeev (4c6fff1)

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[fpetkovski]

Thanks for the contribution. We will need you to sign the CLA before we can merge this.

[logicalhan]

/lgtm

[timp87]

/assign @dgrisonnet

[mrueg]

/lgtm

Thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: logicalhan, mrueg, timp87

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