BUILD: Bump Cython to 3.1 #23652

Job	Run time
python-dev	0s
Linux-32-bit	18m 48s
Pyodide build	27m 34s
Linux-Musl	15m 39s
macos-14 actions-313.yaml	37m 48s
macos-14 actions-311.yaml	48m 39s
windows-latest actions-313.yaml	1h 30m 37s
windows-latest actions-312.yaml	1h 22m 1s
macos-13 actions-310.yaml	1h 10m 6s
macos-13 actions-313.yaml	1h 15m 12s
macos-14 actions-312.yaml	38m 14s
macos-13 actions-311.yaml	1h 8m 30s
macos-13 actions-312.yaml	57m 34s
windows-latest actions-311.yaml	1h 24m 58s
windows-latest actions-310.yaml	1h 24m 43s
macos-14 actions-310.yaml	42m 16s
Pyarrow Nightly	21m 12s
ubuntu-24.04 actions-312.yaml	1h 28m 12s
Freethreading	21m 45s
Locale: it_IT	1h 7m 3s
ubuntu-24.04 actions-313.yaml	1h 30m 24s
Pypy	1m 50s
ubuntu-24.04-arm actions-312.yaml	1h 0m 59s
ubuntu-24.04 actions-311.yaml	1h 26m 5s
ubuntu-24.04-arm actions-311.yaml	59m 45s
Locale: zh_CN	1h 9m 56s
Numpy Dev	17m 45s
ubuntu-24.04 actions-310.yaml	1h 30m 23s
Future infer strings	1h 28m 55s
Future infer strings (without pyarrow)	1h 21m 15s
Minimum Versions	53m 18s
ubuntu-24.04-arm actions-313.yaml	1h 1m 38s
ubuntu-24.04-arm actions-310.yaml	1h 0m 39s
Downstream Compat	6m 19s
	1d 7h 10m 2s

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