add cherry pick to pull request template

[breuerfelix]

How to categorize this PR?

/label task

What this PR does / why we need it:
To not forget to cherry pick changes into the release branches, this PR adds them to the pull request template since almost all PRs should be cherry picked (except renovate PRs).

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Breaking changes:

/cherry-pick release-v1.34
/cherry-pick release-v1.35
/cherry-pick release-v1.36

[ske-prow]

@breuerfelix: The label(s) `/label task

cannot be applied. These labels are supported:tide/merge-method-merge, tide/merge-method-rebase, tide/merge-method-squash, ondemand/skip-deletion, breaking, no-release-note, rrwg-change, skip-review. Is this label configured under labels -> additional_labelsorlabels -> restricted_labelsinplugin.yaml`?

Details

In response to this:

How to categorize this PR?

/label task

What this PR does / why we need it:
To not forget to cherry pick changes into the release branches, this PR adds them to the pull request template since almost all PRs should be cherry picked (except renovate PRs).

Which issue(s) this PR fixes:
Fixes #

Special notes for your reviewer:

Breaking changes:

/cherry-pick release-v1.34
/cherry-pick release-v1.35
/cherry-pick release-v1.36

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[ske-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Details

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[breuerfelix]

/kind task