docs: Fix missing download testdata section in documentation

[thorbjoernl]

Change Summary

Noticed that the section for downloading sample data in the documentation is currently blank. This PR should fix that:

https://pyaerocom.readthedocs.io/en/latest/api.html#access-to-minimal-test-dataset

Related issue number

NA

Checklist

• Start with a draft-PR
• The PR title is a good summary of the changes
• PR is set to AeroTools and a tentative milestone
• Documentation reflects the changes where applicable
• Tests for the changes exist where applicable
• Tests pass locally
• Tests pass on CI
• At least 1 reviewer is selected
• Make PR ready to review

[heikoklein]

https://pyaerocom--1281.org.readthedocs.build/en/1281/api.html#module-pyaerocom.sample_data_access is still empty.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.95%. Comparing base (a6eb787) to head (db12514).
Report is 7 commits behind head on main-dev.

Additional details and impacted files

@@            Coverage Diff            @@
##           main-dev    #1281   +/-   ##
=========================================
  Coverage     78.95%   78.95%           
=========================================
  Files           136      136           
  Lines         20829    20830    +1     
=========================================
+ Hits          16445    16446    +1     
  Misses         4384     4384           

Flag	Coverage Δ
unittests	78.95% <100.00%> (+<0.01%)	⬆️

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[heikoklein]

Wrong formatting, use rest or numpy: https://gist.github.com/nipunsadvilkar/fec9d2a40f9c83ea7fd97be59261c400 (in vscode, I like to use https://marketplace.visualstudio.com/items?itemName=njpwerner.autodocstring )

"""
    Download test_data_file and extracts it.

    :param file_name: The file name to be downloaded.
    :param extract_dir: An optional folder override to where to extract the file. By
    default files are extracted into ~/MyPyaerocom
"""

should work.

[heikoklein]

Still wrong formatting of parameters at https://pyaerocom--1281.org.readthedocs.build/en/1281/api.html#module-pyaerocom.sample_data_access.minimal_dataset after recents fix:formatting:

should look like:

[heikoklein]

👍