docs: stop repeating the section prefix in generated Markdown links

[marekh19]

Part of apify/apify-web#6665

@signalwire/docusaurus-plugin-llms-txt@1.2.2 prepends the site URL to link paths that already carry the Docusaurus baseUrl, so the generated Markdown points at https://docs.apify.com/api/client/python/api/client/python/..., which 404s. It only happens on sites served under a sub-path.

The fix is already upstream in 2.0.0-alpha.6, but it does not look like it will be published soon: npm latest is still 1.2.2 and nothing has shipped since 2.0.0-alpha.7 in November 2025. This patch applies that same fix locally. Remove it once a stable 2.x lands.

Built here: llms-full.txt goes from 4702 doubled links to 0, llms.txt stays at 352 correct links.

The same patch goes into apify-cli, apify-sdk-js, apify-sdk-python and apify-client-js.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.24%. Comparing base (efc009d) to head (0eb988c).
⚠️ Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1070      +/-   ##
==========================================
- Coverage   95.25%   95.24%   -0.02%     
==========================================
  Files          59       59              
  Lines        5547     5547              
==========================================
- Hits         5284     5283       -1     
- Misses        263      264       +1     

Flag	Coverage Δ
integration	92.06% <ø> (+0.01%)	⬆️
unit	87.39% <ø> (-0.02%)	⬇️

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