docs: clean up unreleased changelog section for v3.0.0 (#742) #199

Job	Run time
Code checks / Actions lint check	31s
Code checks / Spell check	6s
Docstrings checks / Docstrings checks	13s
Code checks / Lint check / Lint check (3.11)	11s
Doc checks / Doc checks / Docs check	1m 6s
Code checks / Lint check / Lint check (3.13)	13s
Code checks / Lint check / Lint check (3.12)	12s
Code checks / Type check / Type check (3.14)	14s
Code checks / Type check / Type check (3.11)	10s
Code checks / Type check / Type check (3.12)	13s
Code checks / Lint check / Lint check (3.14)	15s
Code checks / Type check / Type check (3.13)	12s
Tests	0s
Beta release	0s
Doc release / Release docs	1m 58s
	5m 34s

Provide feedback