Update docs dependencies

[ddobie]

Docs now build without a flood of warnings. The only problematic log statement is

INFO    -  DeprecationWarning: Setting a fallback anchor function is deprecated
           and will be removed in a future release.
             File
           "/import/ada2/ddob1600/.conda/envs/vast-pipeline-dev-py311/lib/python3.11/site-packages/mkdocstrings/plugin.py",
           line 190, in on_config
               autorefs.get_fallback_anchor = self.handlers.get_anchors
             File
           "/import/ada2/ddob1600/.conda/envs/vast-pipeline-dev-py311/lib/python3.11/site-packages/mkdocs_autorefs/plugin.py",
           line 130, in get_fallback_anchor
               warn(

I can't see anything online about this, so at this stage it's probably fine.

NOTE: this needs to have #800 merged for the tests to pass - the vaex install fails on later versions of python.

[mauch]

Does this also need a CHANGELOG update?

[ddobie]

Good catch - I'd forgotten to push it. It's there now.