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Changing up/download artifacts to v4 as v3 has been removed. #391

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Job	Run time
Build 🐧 CPython 3.11	21s
Build 🐧 CPython 3.12	24s
Build 🐧 CPython 3.13	27s
Build 🍎 CPython 3.11	1m 2s
Build 🍎 CPython 3.12	46s
Build 🍎 CPython 3.13	46s
Build 🪟 CPython 3.11	2m 54s
Build 🪟 CPython 3.12	2m 43s
Build 🪟 CPython 3.13	57s
Test 🐧 CPython 3.11	36s
Test 🐧 CPython 3.12	33s
Test 🐧 CPython 3.13	32s
Test 🍎 CPython 3.11	44s
Test 🍎 CPython 3.12	35s
Test 🍎 CPython 3.13	34s
Test 🪟 CPython 3.11	2m 53s
Test 🪟 CPython 3.12	2m 17s
Test 🪟 CPython 3.13	1m 50s
All successful	2s
Publish to PyPI	0s
	20m 56s