limit versions of scipy because 1.17.0 breaks our dependency chain on mne

[patricefortin]

With the latest release of scipy (v1.17.0), a method has been removed. The mne version we depend on requires that function but does not pin the scipy version in its dependency.

As a temporary fix (until dependencies are fixed in mne), we limit the upgrade of scipy.

2 ways to reproduce the bug:

Method 1) update hypyp with poetry to the latest version of packages

$ poetry update
Updating dependencies
Resolving dependencies... (9.4s)

Package operations: 0 installs, 1 update, 0 removals

  - Updating scipy (1.16.3 -> 1.17.0)

Writing lock file
$ poetry run python -c 'import hypyp'

Method 2) simply install the latest version from pypi:

$ mkdir -p '/tmp/foo' \
  cd /tmp/foo \
  uv init \
  uv add hypyp \
  uv run python -c 'import hypyp'
  
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/foo/.venv/lib/python3.12/site-packages/hypyp/__init__.py", line 2, in <module>
    from hypyp import analyses, prep, stats, utils, viz
  File "/tmp/foo/.venv/lib/python3.12/site-packages/hypyp/analyses.py", line 30, in <module>
    from mne.time_frequency import EpochsSpectrum
  File "/tmp/foo/.venv/lib/python3.12/site-packages/lazy_loader/__init__.py", line 82, in __getattr__
    submod = importlib.import_module(submod_path)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/pfortin/.pyenv/versions/3.12.11/lib/python3.12/importlib/__init__.py", line 90, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tmp/foo/.venv/lib/python3.12/site-packages/mne/time_frequency/spectrum.py", line 13, in <module>
    from ..channels.channels import UpdateChannelsMixin
  File "/tmp/foo/.venv/lib/python3.12/site-packages/mne/channels/channels.py", line 55, in <module>
    from ..bem import _check_origin
  File "/tmp/foo/.venv/lib/python3.12/site-packages/mne/bem.py", line 41, in <module>
    from .surface import (
  File "/tmp/foo/.venv/lib/python3.12/site-packages/mne/surface.py", line 32, in <module>
    from .transforms import (
  File "/tmp/foo/.venv/lib/python3.12/site-packages/mne/transforms.py", line 17, in <module>
    from scipy.special import sph_harm
ImportError: cannot import name 'sph_harm' from 'scipy.special' (/tmp/foo/.venv/lib/python3.12/site-packages/scipy/special/__init__.py). Did you mean: 'sph_harm_y'?

This will yield the same error.

Here is the commit in scipy repository scipy/scipy@39b8d4d