[9495] Investigate displaying only 1 level for a multi level page in ref data tech docs

[Reyko]

Context

9495-spike-1-day-investigate-displaying-only-1-level-for-a-multi-level-page-in-ref-data-tech-docs

Changes proposed in this pull request

• Set the max level for reference-data to 1
• Sort by latest version number

Guidance to review

Important business

• Does this PR introduce any PII fields that need to be overwritten or deleted in db/scripts/sanitise.sql?
• Does this PR change the database schema? If so, have you updated the config/analytics.yml file and considered whether you need to send 'import_entity' events?
• Do we need to send any updates to TRS as part of the work in this PR?
• Does this PR need an ADR?

NB: Please notify the #twd_data_insights team and ask for a review if new fields are being added to analytics.yml

[github-actions]

Review app for PR pr-6067 was deleted

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.53%. Comparing base (4b129e9) to head (62930d6).
⚠️ Report is 5 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6067   +/-   ##
=======================================
  Coverage   96.53%   96.53%           
=======================================
  Files         842      842           
  Lines       18757    18757           
=======================================
  Hits        18108    18108           
  Misses        649      649           

Flag	Coverage Δ
unittests	96.53% <ø> (ø)

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[tomtrentham]

Nice solution, and makes the docs look so much better 👍

[tomtrentham]

[SPIKE 1 day] Investigate displaying only 1 level for a multi level page in ref data tech docs