Update instructions for upgrading cert-manager resources and CRDs#793

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jetstack-bot merged 2 commits intocert-manager:masterfrom

irbekrm:update_upgrade_instructions

Jan 12, 2022

Commits on Jan 11, 2022

Updates the API migration doc to refer to the new cmctl command
irbekrm
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Update content/en/docs/installation/upgrading/remove-deprecated-apis.md

irbekrm
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maelvls
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