chore: revert previous node-version template changes in ci.yaml#889

gcf-owl-bot[bot] wants to merge 6 commits intomaingoogleapis/nodejs-logging-winston:mainfrom

owl-bot-update-lock-b612d739b0533e56ba174526ca339f264b63e911c30d6f83f55b57c38cc6ad2agoogleapis/nodejs-logging-winston:owl-bot-update-lock-b612d739b0533e56ba174526ca339f264b63e911c30d6f83f55b57c38cc6ad2aCopy head branch name to clipboard