Let's not do the 1.19 Release Retro during Kubecon

[onlydole]

What type of PR is this:

/kind cleanup documentation
/priority important-soon

What this PR does / why we need it:

This PR moves the date of the 1.19 Release Retrospective to the week prior to Kubecon instead of having it occur DURING Kubecon.

/assign @justaugustus @tpepper
/cc @mrbobbytables @jeremyrickard
/cc @kubernetes/release-team-leads @kubernetes/release-team

[hasheddan]

/lgtm
/hold for other reviewers 👍

[cpanato]

/lgtm

[justaugustus]

For context for passerbys, the updated 1.19 release schedule was merged before the announcement that KubeCon Amsterdam was going virtual.

At the time that it was still a physical event, it was scheduled for August 13-16, which did not conflict w/ our schedule.

Thanks for the update, @onlydole!
...and thanks to @xmudrii (I think was you) for raising this scheduling conflict in the 5/5 SIG Release meeting.

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cpanato, hasheddan, justaugustus, onlydole

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• releases/release-1.19/OWNERS [justaugustus,onlydole]

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[justaugustus]

/hold cancel