KEP-1491: set latest milestone for vSphere migration to 1.26

[divyenpatel]

• One-line PR description:
  set latest milestone for vSphere migration to 1.26

• Issue link: vSphere in-tree to CSI driver migration #1491

• Other comments:

[xing-yang]

Can you also update this file: https://github.com/kubernetes/enhancements/blob/master/keps/prod-readiness/sig-storage/1491.yaml

[divyenpatel]

Can you also update this file: https://github.com/kubernetes/enhancements/blob/master/keps/prod-readiness/sig-storage/1491.yaml

Done.

[xing-yang]

/assign @gnufied @jingxu97

[kikisdeliveryservice]

@divyenpatel For future PRs in this repo, don't forget to include the kep number in the title of the PR and the Issue Link in the PR template. I've updated both for you. :)

[xing-yang]

/lgtm
/approve

[xing-yang]

/assign @wojtek-t
for PRR review

[wojtek-t]

Just a small comment - I'm fine with the PRR itself.

[xing-yang]

/lgtm

[wojtek-t]

/lgtm
/approve PRR

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: divyenpatel, wojtek-t, xing-yang

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Needs approval from an approver in each of these files:

• keps/prod-readiness/OWNERS [wojtek-t]
• keps/sig-storage/OWNERS [xing-yang]

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