KEP-5307: Correct typo in feature gate name

[yuanwang04]

• One-line PR description: Changes the typo in feature gate name from ContainerRestartPolicy to ContainerRestartRules.

• Issue link: Container restart rules to customize the pod restart policy #5307

• Other comments:

[k8s-ci-robot]

Hi @yuanwang04. Thanks for your PR.

I'm waiting for a kubernetes member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[yuanwang04]

/cc @SergeyKanzhelev

[SergeyKanzhelev]

/lgtm

/assign @mrunalp

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: SergeyKanzhelev, yuanwang04
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[SergeyKanzhelev]

/ok-to-test

[yuanwang04]

@mrunalp Could you help to review and approve this? Thanks!