If it's baked into the tool (can run offline) then it would be unavoidable, need a new version to get a new release on the package manager.
1.2.3 -> 1.2.3+1 (or +anything, date, whatever) could arguably be idiomatic semver though - that's what you do for packaging changes, like updating the description or categories to file it under etc. without actually changing the program.
And yet you need internet access when running the package with npx, even though the package is already locally installed.
At least, I can't use npx on so e of my VMs which do not have access to the internet. It just takes forever to atart (and I get annoyed after some minutes).