bump pytensor/pymc is needed after release

[ferrine]

.venv/lib/python3.11/site-packages/pymc_experimental/gp/latent_approx.py:19: in <module>
    from pymc.gp.util import JITTER_DEFAULT, cholesky, solve_lower, solve_upper, stabilize
E   ImportError: cannot import name 'cholesky' from 'pymc.gp.util' (/home/ferres/Probabilistic/mmm/.venv/lib/python3.11/site-packages/pymc/gp/util.py)

[ricardoV94]

See #240