[A-G0D]

What this fixes

Fixes #49. In episodes/intro.md, the lesson quotes Karan Praharaj from
https://towardsdatascience.com/how-are-algorithms-biased-8449406aaa83. That URL now returns HTTP 404
("Page not found | Towards Data Science"), so learners cannot reach the source of the quote. The issue
notes that the article is still published at its medium.com/data-science address, and that page is
HTTP 200 with the same author, title and quoted sentence.

Reproduction: a browser-like GET of the towardsdatascience.com URL returns 404. (From this network,
curl gets 403 from Medium's bot protection, so the 404 was confirmed with a browser-like fetch.)

Root cause

episodes/intro.md:74 links to the retired towardsdatascience.com host for this article.

Fix

Point the link at https://medium.com/data-science/how-are-algorithms-biased-8449406aaa83, the URL
given in the issue. Link text and the quotation are unchanged.

Verification

• Browser-like GET of https://towardsdatascience.com/how-are-algorithms-biased-8449406aaa83 → 404 (before)
• Browser-like GET of https://medium.com/data-science/how-are-algorithms-biased-8449406aaa83 → 200,
  title "Bias In AI Algorithms" by Karan Praharaj, containing the quoted paragraph (after)
• grep -rn "towardsdatascience.com/how-are-algorithms-biased" --include=*.md . → no matches
• git diff --check → clean
• The lesson site is built by The Carpentries Workbench (sandpaper + pandoc + the
  carpentries/workbench-docker image) in CI. R and pandoc are not installed in this environment, so
  the site build itself could not be run locally; the change is a URL-only edit in Markdown.

Risk / rollback

One URL in one file. Reverting the commit restores the previous link.

AI assistance: prepared with an AI coding agent; I reviewed and ran the checks above.

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