TST: devdeps has 4 failures with "Physical type may be ambiguous"

[pllim]

Example log: https://github.com/astropy/specutils/actions/runs/20184900908/job/57952931788

UserWarning: Physical type may be ambiguous. Consider setting the physical type explicitly as either 'spect.dopplerVeloc.optical' or 'spect.dopplerVeloc.radio'.

• specutils/tests/test_resample.py::test_resample_different_units[LinearInterpolatedResampler]
• specutils/tests/test_resample.py::test_resample_different_units[SplineInterpolatedResampler]
• specutils/tests/test_spectrum1d.py::test_spectral_axis_conversions
• specutils/tests/test_spectrum1d.py::test_spectral_axis_and_flux_conversions

Caused by spacetelescope/gwcs#659