ci: upgrade download-artifact from v4 to v8 (#733) #137

Job	Run time
Docstrings checks / Docstrings checks	16s
Code checks / Spell check	6s
Tests / Integration tests (3.11, ubuntu-latest)	2m 11s
Tests / Integration tests (3.14, ubuntu-latest)	2m 18s
Doc checks / Doc checks / Docs check	1m 18s
Code checks / Actions lint check	30s
Code checks / Lint check / Lint check (3.14)	15s
Code checks / Lint check / Lint check (3.12)	13s
Code checks / Lint check / Lint check (3.11)	13s
Code checks / Type check / Type check (3.13)	11s
Code checks / Lint check / Lint check (3.13)	19s
Code checks / Type check / Type check (3.14)	12s
Code checks / Type check / Type check (3.11)	11s
Code checks / Type check / Type check (3.12)	13s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	43s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 19s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	35s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	39s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 1s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	55s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 11s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	40s
Doc release	0s
Release prepare	0s
Changelog update	0s
PyPI publish	-1s
Doc release post publish	-1s
	15m 27s

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