Unpin setuptools-scm

[xjules]

Describe the bug
The version.py generated by setuptools-scm got miss-malformed for version setuptools-scm==8. Check here:
https://github.com/equinor/ert/actions/runs/6247503552/job/16960301138?pr=6118

/opt/hostedtoolcache/Python/3.10.13/x64/lib/python3.10/site-packages/ert/shared/__init__.py:2: in <module>
    from ert.shared.version import version as __version__
E     File "/opt/hostedtoolcache/Python/3.10.13/x64/lib/python3.10/site-packages/ert/shared/version.py", line 4
E       __version__ : str = version : str = '7.0.0b1.dev114+gb1e9c3d30'

To reproduce
Steps to reproduce the behaviour:

1. pip install setuptools-scm==8.0.0
2. pytest

Expected behaviour
Should work

[oyvindeide]

WIll be fixed in a few minutes: pypa/setuptools-scm#905, closing