Check the nodejs-offline-buildpack version that is shipped with your new TAS version in the release notes, E.g. https://docs.vmware.com/en/VMware-Tanzu-Application-Service/2.11/tas-for-vms/runtime-rn.html, go to https://network.tanzu.vmware.com/products/nodejs-buildpack/ and download the needed version.
Then use the cf create-buildpack command to upload the buildpack into your deployment
cf create-buildpack BUILDPACK PATH POSITION
Make sure that the position is lower than the older, locked buildpack so the newer one is picked up when the errand is running. You can also just delete the old one, to avoid conflict with newer.