chore(deps): update dependency pytest to v9 (#132)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pyproject.toml

@@ -45,7 +45,7 @@ dev = [
   "array-api-compat>=1.11.2",
   "array-api-strict>=2.3.1",
   "attrs>=25.3.0",
-  "pytest>=8,<9",
+  "pytest>=9,<10",
   "pytest-cov>=7,<8",
   "rich>=14.0.0",
   "ruff>=0.11.13",