release notes: add 0.2.2

[sylvestre]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #8998 will improve performances by 3.9%

_{Comparing sylvestre:rn-0.2.2 (7c71d11) with main (01c0a61)}

Summary

⚡ 4 improvements
✅ 102 untouched
⏩ 73 skipped¹

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	du_balanced_tree[(5, 4, 10)]	9.3 ms	9.1 ms	+2.59%
⚡	du_human_balanced_tree[(5, 4, 10)]	10.5 ms	10.1 ms	+3.9%
⚡	du_max_depth_balanced_tree[(6, 4, 10)]	33.2 ms	32.4 ms	+2.48%
⚡	du_summarize_balanced_tree[(5, 4, 10)]	8.5 ms	8.4 ms	+2.19%

Footnotes

1. 73 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tail/overlay-headers (fails in this run but passes in the 'main' branch)

[oech3]

Merging #8998 will improve performances by 3.9%

Changing doc is improving performance. Something wrong...

[sylvestre]

Merging #8998 will improve performances by 3.9%

Changing doc is improving performance. Something wrong...

yeah, the test might be unstable in term of perf