devel/py-click-aliases: Fix BUILD_DEPENDS

from pyproject.toml:
[build-system]
requires = ["poetry-core>=1.0.0"]
build-backend = "poetry.core.masonry.api"

Approved by: portmgr (blanket)
With hat: python
Reference: https://github.com/Mause/duckdb_engine/blob/v0.11.2/pyproject.toml#L55-L57