fix release binary archive contains unnecessary dir

[koba1t]

I think the current binary release script contains a problem that contains an unnecessary directory name for the archive file.

kob@Yugos-MacBook-Air tmp % curl -ssLO "https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv5.2.0/kustomize_v5.2.0_linux_amd64.tar.gz"
kob@Yugos-MacBook-Air tmp % curl -ssLO "https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv5.1.0/kustomize_v5.1.0_linux_amd64.tar.gz"
kob@Yugos-MacBook-Air tmp % tar xvf kustomize_v5.2.0_linux_amd64.tar.gz
x output/kustomize
kob@Yugos-MacBook-Air tmp % tar xvf kustomize_v5.1.0_linux_amd64.tar.gz
x kustomize

[koba1t]

I think the new commands are successful.

kob@Yugos-MacBook-Air tmp % tar cvfz "kustomize.tar.gz" -C output kustomize
a kustomize
kob@Yugos-MacBook-Air tmp % tar xvf kustomize.tar.gz
x kustomize
kob@Yugos-MacBook-Air tmp % file kustomize
kustomize: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), statically linked, Go BuildID=1Rnz85RfK6QgqoJruz46/tpXGW6dqOO1DbuDFlMBp/wjYTqE1kY-HXBeykZluB/pxOYIAvnTi-Es6C1uMcJ, stripped

kob@Yugos-MacBook-Air tmp % zip -j kustomize.zip output/kustomize
updating: kustomize (deflated 60%)
kob@Yugos-MacBook-Air tmp % unzip kustomize.zip
Archive:  kustomize.zip
  inflating: kustomize

[annasong20]

/lgtm
/hold for @koba1t's explicit merge

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: koba1t, natasha41575

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[sealneaward]

This will fix the following issue.

[natasha41575]

/unhold

[natasha41575]

FYI @koba1t I'm rereleasing kustomize right now