ci(release): do not use pip to install poetry

[pcattori]

↪️ Pull Request

The poetry docs explicitly warn against using pip for installation. See https://python-poetry.org/docs/#installing-with-pip. Instead, we'll use a Github Action tailor-made for installing poetry.

[github-actions[bot]]

:tada: This PR is included in version 1.1.0 :tada:

The release is available on:

• v1.1.0
• GitHub release

Your semantic-release bot :package::rocket: