TestGARCH11::test_batched_size is failing under uncertain conditions

[ferrine]

Description

Tests are failing under uncertain conditions

https://github.com/pymc-devs/pymc/actions/runs/5334979522/jobs/9667560750?pr=6780

in #6780

FAILED tests/distributions/test_timeseries.py::TestGARCH11::test_batched_size[True-alpha_1]

[ricardoV94]

Would be useful to put the name of the test on the title of the issue

[ricardoV94]

For anyone investigating, usually these boil down to seeding issues