Bump tower cli version to v0.5

[ewels]

No description provided.

[ewels]

DO NOT MERGE. This will break everything because of this line in the v0.5 changelog:

At tw launch only accepts full URL repositories as Nextflow pipelines.

We provide ${{ github.repository }}, which is the GitHub repo name, eg. nf-core/viralrecon

[ewels]

After some discussion in Slack, I don't think that we can automate this away. We'll need to update the nf-core template.

This should be fine as we can set this to be a major version change, leaving existing pipeline code functional with the v0.4 release of the Tower CLI. That will continue to work until v0.4 stops working with https://tower.nf - meanwhile the template update to v3 of this release will use v0.5 of the tw cli and not specify the default, meaning that the default value in this action with the URL prefix will be used.

Could do with some actual testing..