Add news fragment. #5547

Job	Run time
test_cygwin (39, windows-latest)	15m 28s
collateral (diffcov)	4m 44s
test (3.8, ubuntu-latest)	3m 47s
collateral (docs)	1m 49s
test (3.8, windows-latest)	10m 33s
test (3.13, ubuntu-latest)	4m 47s
test (3.13, macos-latest)	4m 0s
test (3.13, windows-latest)	11m 3s
test (3.9, ubuntu-latest)	4m 11s
test (3.10, ubuntu-latest)	3m 54s
test (3.11, ubuntu-latest)	3m 41s
test (3.12, ubuntu-latest)	4m 54s
test (3.14, ubuntu-latest)	4m 41s
test (pypy3.10, ubuntu-latest, stdlib)	11m 44s
test (ubuntu-latest, 3.10, stdlib)	3m 48s
test (3.8, macos-13)	5m 38s
integration-test	0s
check	3s
release	0s
	1h 38m 45s

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