Remove `auto` argument from `pm.Deterministic` docstring

[larryshamalama]

Description

In #6309, the auto argument was removed from pm.Deterministic. However, it is still visible in the docstrings as we can see below:

pymc/pymc/model.py

Lines 2011 to 2017 in b6521f2

	Parameters
	----------
	name: str
	var: PyTensor variables
	auto: bool
	Add automatically created deterministics (e.g., when imputing missing values)
	to a separate model.auto_deterministics list for filtering during sampling.