chore: revert previous node-version template changes in ci.yaml#1605

gcf-owl-bot[bot] wants to merge 1 commit intomaingoogleapis/cloud-trace-nodejs:mainfrom

owl-bot-update-lock-b612d739b0533e56ba174526ca339f264b63e911c30d6f83f55b57c38cc6ad2agoogleapis/cloud-trace-nodejs:owl-bot-update-lock-b612d739b0533e56ba174526ca339f264b63e911c30d6f83f55b57c38cc6ad2aCopy head branch name to clipboard