Update changelog for v1.29.1 patch release. #50

Job	Run time
initialize / define-constants	3s
test / lint-and-build	39s
test / test-coverage (ubuntu-latest, 3.11)	32s
test / test-coverage (ubuntu-latest, 3.13)	38s
test / test-coverage (ubuntu-latest, 3.12)	43s
test / test-coverage (windows-latest, 3.10)	1m 21s
test / test-coverage (macos-latest, 3.11)	33s
test / test-coverage (macos-latest, 3.12)	34s
test / test-coverage (windows-latest, 3.12)	1m 22s
test / test-coverage (macos-latest, 3.10)	45s
test / test-coverage (ubuntu-latest, 3.10)	37s
test / test-coverage (windows-latest, 3.13)	1m 15s
test / test-coverage (windows-latest, 3.11)	1m 37s
test / test-coverage (macos-latest, 3.13)	33s
report / report-coverage	31s
docsgen / generate	57s
docsgen / publish	10s
package / package	17s
publish-pypi	19s
publish-github	32s
	13m 58s

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