Drop python_version<'3.14' pin for numba

[DanielYang59]

numba now support python 3.14: numba/numba#9957 (comment)

[DanielYang59]

This error happened in https://github.com/materialsproject/pymatgen/actions/runs/20098743541/job/57663729472?pr=4565 as well (which didn't touch numba), so guess it's not related:

self = <analysis.test_phase_diagram.TestPhaseDiagram object at 0x7fd2d0d11850>

    def test_as_from_dict(self):
        # test round-trip for other entry types such as ComputedEntry
        entry = ComputedEntry("H", 0.0, 0.0, entry_id="test")
        pd = PhaseDiagram([entry])
        pd_dict = pd.as_dict()
        pd_roundtrip = PhaseDiagram.from_dict(pd_dict)
        assert pd.all_entries[0].entry_id == pd_roundtrip.all_entries[0].entry_id
        dd = self.pd.as_dict()
        new_pd = PhaseDiagram.from_dict(dd)
        new_pd_dict = new_pd.as_dict()
        assert len(new_pd_dict) == len(dd)
        for k, v in new_pd_dict.items():
>           assert v == dd[k]
E           AssertionError: assert {'all_entries...2), ...], ...} == {'all_entries...2), ...], ...}
E             
E             (pytest_assertion plugin: representation of details failed: /home/runner/micromamba/envs/pmg/lib/python3.14/site-packages/_pytest/assertion/util.py:508: ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all().
E              Probably an object has a faulty __repr__.)