Improve how-to indexing and titles

[philippjfr]

Fixes #562

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.43%. Comparing base (c360b5b) to head (c8d9d0d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #567   +/-   ##
=======================================
  Coverage   68.43%   68.43%           
=======================================
  Files          31       31           
  Lines        3152     3152           
=======================================
  Hits         2157     2157           
  Misses        995      995           

☔ 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.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.