chore(deps): update codecov/codecov-action action to v6 #357

Job	Run time
PR title check	4s
Docstrings checks / Docstrings checks	11s
Tests / Integration tests (3.11, ubuntu-latest)	2m 16s
Tests / Integration tests (3.14, ubuntu-latest)	2m 21s
Code checks / Actions lint check	31s
Code checks / Spell check	5s
Doc checks / Doc checks / Docs check	1m 20s
Code checks / Lint check / Lint check (3.11)	12s
Code checks / Lint check / Lint check (3.14)	11s
Code checks / Type check / Type check (3.11)	13s
Code checks / Lint check / Lint check (3.12)	9s
Code checks / Lint check / Lint check (3.13)	10s
Code checks / Type check / Type check (3.14)	16s
Tests / Unit tests / Unit tests (windows-latest, 3.13)	1m 4s
Code checks / Type check / Type check (3.12)	10s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.11)	43s
Tests / Unit tests / Unit tests (windows-latest, 3.12)	1m 5s
Tests / Unit tests / Unit tests (windows-latest, 3.14)	1m 5s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.13)	47s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.12)	42s
Tests / Unit tests / Unit tests (ubuntu-latest, 3.14)	42s
Tests / Unit tests / Unit tests (windows-latest, 3.11)	1m 14s
Code checks / Type check / Type check (3.13)	11s
	15m 42s

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