`package-mode` in `pyproject.toml` is breaking bootstrap for older poetry versions

[iskysun96]

Subject of the issue

My poetry version was on 1.6 and it didn't recognize package-mode in pyproject.toml

I updated poetry to latest version (1.8.3) and now it works.

Your environment

algokit doctor didn't complain about poetry version being outdated

Steps to reproduce

1. downgrade poetry to version 1.6 and run algokit project bootstrap all