puerco: Patch relnotes.k8s.io to release v1.18.12

JobBuild
225
02-28 22:42
pull-release-notes-build-dev 1366156742123065344
pull-release-notes-build-prod 1366156742156619776
pull-release-notes-check-prettier 1366156742190174208
pull-release-notes-doc 1366156742219534336
pull-release-notes-e2e 1366156742253088768
pull-release-notes-lint 1366156742282448896
pull-release-notes-test 1366156742324391936