Update CHANGELOG.md for 4.3.1 (#1706) #658

Job	Run time
docs	3m 51s
build	19s
format	19s
static-code-analysis	35s
test (ubuntu-latest, false, 3.8)	2m 56s
test (ubuntu-latest, false, 3.9)	2m 32s
test (ubuntu-latest, false, 3.10)	2m 37s
test (ubuntu-latest, false, 3.11)	2m 34s
test (ubuntu-latest, false, 3.12)	2m 30s
test (ubuntu-latest, false, pypy-3.8)	3m 21s
test (ubuntu-latest, false, pypy-3.9)	3m 12s
test (macos-latest, false, 3.8)	5m 18s
test (macos-latest, false, 3.9)	2m 4s
test (macos-latest, false, 3.10)	1m 41s
test (macos-latest, false, 3.11)	2m 3s
test (macos-latest, false, 3.12)	2m 30s
test (macos-latest, false, pypy-3.8)	3m 47s
test (macos-latest, false, pypy-3.9)	5m 12s
test (windows-latest, false, 3.8)	1m 51s
test (windows-latest, false, 3.9)	1m 56s
test (windows-latest, false, 3.10)	1m 57s
test (windows-latest, false, 3.11)	2m 6s
test (windows-latest, false, 3.12)	2m 17s
test (windows-latest, false, pypy-3.8)	6m 1s
test (windows-latest, false, pypy-3.9)	6m 11s
upload_pypi	0s
coveralls	6s
	1h 9m 46s

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