Resolve deprecation warnings when building Cython examples #5077

Job	Run time
build_linux (3.9)	36m 17s
build_linux (3.10)	37m 8s
build_windows (3.9)	1h 3m 18s
build_linux (3.11)	36m 23s
build_linux (3.12)	37m 51s
build_windows (3.10)	1h 1m 50s
build_windows (3.11)	1h 4m 3s
build_windows (3.12)	1h 2m 4s
test_linux (3.9, false, ubuntu-22.04)	10m 59s
test_linux (3.10, false, ubuntu-22.04)	10m 13s
test_examples_linux (3.11, false, ubuntu-22.04)	26m 11s
array-api-conformity (3.10, false, ubuntu-22.04)	5m 54s
test_linux (3.11, false, ubuntu-22.04)	11m 8s
test_linux (3.12, false, ubuntu-22.04)	10m 57s
upload_linux	0s
test_windows (3.9, false, windows-2019)	13m 14s
test_windows (3.10, false, windows-2019)	13m 8s
test_windows (3.11, false, windows-2019)	13m 26s
test_windows (3.12, false, windows-2019)	13m 34s
upload_windows	0s
Clean up anaconda packages	0s
	8h 47m 38s

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