Fix headings in CHANGELOG.md

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 54.06%. Comparing base (0311d7e) to head (effe3eb). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #70 +/- ## ======================================= Coverage 54.06% 54.06% ======================================= Files 29 29 Lines 2090 2090 ======================================= Hits 1130 1130 Misses 891 891 Partials 69 69 ```

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