docs: Fix mkdocs DeprecationWarning

[ns-rse]

Docs failed to build...

WARNING -  Config value 'plugins': Plugin 'mike' option 'version': Unrecognised configuration name: version
INFO    -  MERMAID2  - Initialization arguments: {}
INFO    -  MERMAID2  - Using javascript library (10.4.0):
   https://unpkg.com/mermaid@10.4.0/dist/mermaid.esm.min.mjs
INFO    -  Cleaning site directory
INFO    -  Building documentation to directory: /home/runner/work/AFMReader/AFMReader/site
INFO    -  The following pages exist in the docs directory, but are not included in the "nav" configuration:
  - api.md
ERROR   -  Error reading page 'api/asd.md':
ERROR   -  Invalid options: PythonOptions.__init__() got an unexpected keyword argument 'rendering'

Aborted with a BuildError!
Error: Process completed with exit code 1.

Locally we get more information (even though we are using the same versions of packages) and the pages render...

INFO    -  DeprecationWarning: Passing extra options directly under `options` is deprecated. Instead, pass them under `options.extra`, and update your templates. Current extra (unrecognized) options: rendering

This is caused because of the following per-file options in the api/ files...

::: AFMReader.topostats
   handler: python
   options:
       docstring_style: numpy
       rendering:
           show_signature_annotations: true

If you remove the options and just leave the reference to the API in each file, i.e.

::: AFMReader.topostats

...and add the options globally under the mkdocstrings section of mkdocs.yml

plugins:
  ...
  - mkdocstrings:
      handlers:
       python:
         options:
           docstring_style: numpy
           show_signature_annotations: true

...then you shouldn't get the deprecation warning.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.84%. Comparing base (ac9753c) to head (d65d297).
⚠️ Report is 238 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #183      +/-   ##
==========================================
+ Coverage   74.62%   79.84%   +5.21%     
==========================================
  Files           8       12       +4     
  Lines         607      928     +321     
==========================================
+ Hits          453      741     +288     
- Misses        154      187      +33     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.