docs: clean up unreleased changelog section for v3.0.0 #489

Job	Run time
PR title check	3s
Docstrings checks / Docstrings checks	12s
Tests / Integration tests (3.11, ubuntu-latest)	2m 24s
Code checks / Spell check	5s
Code checks / Actions lint check	28s
Tests / Integration tests (3.14, ubuntu-latest)	2m 44s
Doc checks / Doc checks / Docs check	1m 27s
Code checks / Type check / Type check (3.13)	17s
Code checks / Type check / Type check (3.11)	9s
Code checks / Lint check / Lint check (3.14)	13s
Code checks / Type check / Type check (3.12)	13s
Code checks / Lint check / Lint check (3.11)	9s
Code checks / Type check / Type check (3.14)	12s
Code checks / Lint check / Lint check (3.13)	12s
Code checks / Lint check / Lint check (3.12)	9s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	36s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	59s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 0s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	40s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	58s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	42s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	41s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	52s
	15m 25s

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