chore(deps): update dependency pytest to v9 (#10)

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

Author: renovate[bot]

pyproject.toml

@@ -11,7 +11,7 @@ dependencies = ["cryptography>=46.0.3,<46.1.0"]
 [dependency-groups]
 dev = [
     "poethepoet>=0.39,<0.40",
-    "pytest>=8.3.3,<9",
+    "pytest>=9.0.2,<10",
     "mypy>=1.11.2,<2",
     "pytest-deadfixtures>=2.2.1,<3",
     "coverage>=7.6.1,<8",