Revert "Bump mkdocs-material from 9.5.31 to 9.5.32"

[najohnsn]

Reverts #119

Caused a build error: https://github.com/IBM/tnz/actions/runs/10456853320/job/28955152960

Need to investigate more why the breakage occurred:

File "/opt/hostedtoolcache/Python/3.12.4/x64/lib/python3.12/site-packages/mkdocstrings_handlers/python/handler.py", line 15, in <module>
    from griffe import (
ImportError: cannot import name 'patch_logger' from 'griffe' (/opt/hostedtoolcache/Python/3.12.4/x64/lib/python3.12/site-packages/griffe/__init__.py). Did you mean: 'patch_loggers'?
Error: Process completed with exit code 1.