Fix h5 links in export documentation

[stephprince]

Motivation

Sphinx link checks were failing from changes to the hdf5 documentation.

Checklist

• Did you update CHANGELOG.md with your changes?
• Have you checked our Contributing document?
• Have you ensured the PR clearly describes the problem and the solution?
• Is your contribution compliant with our coding style? This can be checked running ruff check . && codespell from the source directory.
• Have you checked to ensure that there aren't other open Pull Requests for the same change?
• Have you included the relevant issue number using "Fix #XXX" notation where XXX is the issue number? By including "Fix #XXX" you allow GitHub to close issue #XXX when the PR is merged.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.87%. Comparing base (d32188b) to head (b3a65a4).
Report is 1 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1970   +/-   ##
=======================================
  Coverage   91.87%   91.87%           
=======================================
  Files          27       27           
  Lines        2695     2695           
  Branches      703      703           
=======================================
  Hits         2476     2476           
  Misses        145      145           
  Partials       74       74           

Flag	Coverage Δ
integration	72.69% <ø> (ø)
unit	83.33% <ø> (ø)

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