Read the docs fix

[bayliffe]

Add sphinx config path explicitly to readthedocs yaml file to accommodate recent deprecation, see:
https://about.readthedocs.com/blog/2024/12/deprecate-config-files-without-sphinx-or-mkdocs-config

Testing:
Built the latest docs using this change which can be seen here: https://bens-improver-fork.readthedocs.io/en/latest/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.40%. Comparing base (84a8944) to head (2eaebc5).
Report is 68 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2093      +/-   ##
==========================================
+ Coverage   98.39%   98.40%   +0.01%     
==========================================
  Files         124      134      +10     
  Lines       12212    13267    +1055     
==========================================
+ Hits        12016    13056    +1040     
- Misses        196      211      +15     

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[gavinevans]

Thanks @bayliffe 👍

This makes sense based on the recent read the docs deprecation.

[brhooper]

Thanks @bayliffe