Update to Python SDK 1.21.1 (#271) #1040

Job	Run time
build-lint-test (3.10, macos-arm)	7m 20s
build-lint-test (3.10, windows-latest)	6m 31s
build-lint-test (3.14, ubuntu-latest)	15m 7s
build-lint-test (3.10, macos-intel)	8m 56s
build-lint-test (3.10, ubuntu-latest)	5m 46s
build-lint-test (3.14, macos-arm)	10m 8s
build-lint-test (3.14, macos-intel)	16m 9s
build-lint-test (3.14, windows-latest)	18m 41s
	1h 28m 38s

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