build(publish): fech depth to 2 for linter on master branch

[EtienneM]

The CI currently fails on master. For instance: https://github.com/Scalingo/cli/actions/runs/7900369881/job/21561746176

This is because of the error:

level=warning msg="[runner] Can't process result by diff processor: can't prepare diff by revgrep: could not read git repo: error executing git diff \"HEAD~1\" \"\": exit status 128"

This PR is a fix for the code introduced in #758

n/a:

• Add a changelog entry in the section "To Be Released" of CHANGELOG.md

[curzolapierre]

LGTM