Backport PR #14200: Update what's new for 8.16.1 #93

Job	Run time
test (ubuntu-latest, 3.9, test_extra)	2m 37s
test (ubuntu-latest, 3.10, test_extra)	2m 38s
test (ubuntu-latest, 3.11, test_extra)	2m 34s
test (windows-latest, 3.9, test_extra)	3m 58s
test (windows-latest, 3.10, test_extra)	4m 47s
test (windows-latest, 3.11, test_extra)	4m 7s
test (macos-latest, 3.9, test_extra)	4m 20s
test (macos-latest, 3.11, test_extra)	3m 58s
test (ubuntu-latest, 3.11, test)	2m 4s
test (ubuntu-latest, 3.12-dev, test)	3m 13s
test (ubuntu-latest, pypy-3.9, test)	4m 5s
test (windows-latest, pypy-3.9, test)	4m 2s
test (macos-latest, pypy-3.9, test)	5m 39s
	48m 2s

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