Fix typo and tweak wording in get_dependencies() docs

[dylanhmorris]

Changes

• Fixes a typo ("do" should be "due to")
• Suggests some other small wording tweaks

[martinjankowiak]

thanks!

[martinjankowiak]

please fix linting issue

numpyro/infer/inspect.py:135:75: W291 Trailing whitespace
    |
133 |     in the posterior due to a so-called "collider" variable ``c``. ``a``
134 |     and ``b`` both affect `c``, and so they are conditionally dependent
[13](https://github.com/pyro-ppl/numpyro/actions/runs/13310600270/job/37171943767?pr=1975#step:5:14)5 |     given a value of ``c``. This is called "moralization" in the graphical 
    |                                                                           ^ W291
136 |     model literature.::
    |
    = help: Remove trailing whitespace

[dylanhmorris]

Should be fixed in 5760844