docs: clean up unreleased changelog section for v3.0.0 #507

Job	Run time
PR title check	5s
Docstrings checks / Docstrings checks	12s
Code checks / Actions lint check	32s
Tests / Integration tests (3.11, ubuntu-latest)	2m 18s
Tests / Integration tests (3.14, ubuntu-latest)	2m 40s
Code checks / Spell check	6s
Doc checks / Doc checks / Docs check	1m 0s
Code checks / Type check / Type check (3.12)	10s
Code checks / Lint check / Lint check (3.11)	11s
Code checks / Type check / Type check (3.14)	11s
Code checks / Lint check / Lint check (3.14)	12s
Code checks / Lint check / Lint check (3.12)	12s
Code checks / Type check / Type check (3.13)	10s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 12s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 3s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	55s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	37s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	42s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	55s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	41s
Code checks / Lint check / Lint check (3.13)	11s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	42s
Code checks / Type check / Type check (3.11)	10s
	15m 7s

Provide feedback