update docs link for arrow-datasets

[tsmathis]

changed my mind on the layout of the docs for arrow/delta related topics

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.84%. Comparing base (c0f976d) to head (f4ec233).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1064      +/-   ##
==========================================
+ Coverage   71.80%   71.84%   +0.03%     
==========================================
  Files          55       55              
  Lines        3075     3079       +4     
==========================================
+ Hits         2208     2212       +4     
  Misses        867      867              

☔ 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.