fix: render correct html for footnotes

[lepture]

#428

[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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.69%. Comparing base (7dda5f5) to head (9b62204).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #429   +/-   ##
=======================================
  Coverage   91.68%   91.69%           
=======================================
  Files          34       34           
  Lines        2634     2637    +3     
  Branches      429      430    +1     
=======================================
+ Hits         2415     2418    +3     
  Misses        147      147           
  Partials       72       72           

Flag	Coverage Δ
unittests	91.65% <100.00%> (+<0.01%)	⬆️

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