docs: clean up unreleased changelog section for v3.0.0 #643

Job	Run time
PR title check	4s
Code checks / Spell check	6s
Tests / Integration tests (3.11, ubuntu-latest)	2m 22s
Docstrings checks / Docstrings checks	11s
Package check / Package check	19s
Tests / Integration tests (3.14, ubuntu-latest)	2m 28s
Doc checks / Doc checks / Docs check	1m 0s
Code checks / Type check / Type check (3.14)	15s
Code checks / Actions lint check	30s
Code checks / Lint check / Lint check (3.12)	10s
Code checks / Lint check / Lint check (3.13)	13s
Code checks / Lint check / Lint check (3.11)	14s
Code checks / Type check / Type check (3.11)	13s
Code checks / Lint check / Lint check (3.14)	14s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 15s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 5s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	47s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 6s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	47s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 17s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	46s
Code checks / Type check / Type check (3.13)	12s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	52s
Code checks / Type check / Type check (3.12)	10s
	16m 36s

Provide feedback