docs: correct history document formatting

[codecov[bot]]

Codecov Report

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

Project coverage is 73.17%. Comparing base (fc668bc) to head (91d77b1).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #20 +/- ## ======================================= Coverage 73.17% 73.17% ======================================= Files 30 30 Lines 2188 2188 ======================================= Hits 1601 1601 Misses 587 587 ```

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Bencher

Report	Thu, March 14, 2024 at 00:16:28 UTC
Project	theseus-rs/rsql
Branch	correct-doc-format
Testbed	localhost

Benchmark	Latency	Latency Results nanoseconds (ns)
version	➖ (view plot)	46335000.000

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