chore(updatecli): adapt jenkins-version manifest

[lemeurherve]

Follow-up of:

• chore: verify WAR signature when downloading it #2233

Also amends (for the missing make.ps1 target):

• chore(updatecli): keep default JENKINS_VERSION and WAR_SHA up to date #2171

Refs:

• Verify WAR signature when downloading it #2203

Testing done

updatecli diff --config ./updatecli/updatecli.d/jenkins-version.yaml --values ./updatecli/values.github-action.yaml

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