chore: update CHANGELOG for v0.16.6 #1246

Job	Run time
Code style	1m 25s
Update CHANGELOG (on release)	0s
Doc style	14s
Doc building	1m 13s
Build and smoke tests (ubuntu-latest, 3.9, false)	25s
Build and smoke tests (ubuntu-latest, 3.10, false)	23s
Build and smoke tests (ubuntu-latest, 3.11, false)	24s
Build and smoke tests (ubuntu-latest, 3.12, false)	23s
Build and smoke tests (windows-latest, 3.9, false)	1m 41s
Build and smoke tests (windows-latest, 3.10, false)	1m 36s
Build and smoke tests (windows-latest, 3.11, false)	1m 39s
Build and smoke tests (windows-latest, 3.12, false)	1m 59s
Build library	13s
Release project to private PyPI, public PyPI and GitHub	0s
Doc dev version deploy	0s
Doc stable version deploy	0s
Deploy dev index docs	0s
Deploy stable docs index	0s
	11m 35s

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