ci(py-deps): Bump pytest from 8.4.1 to 9.0.0 (#259)

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.4.1 to 9.0.0.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.4.1...9.0.0)

---
updated-dependencies:
- dependency-name: pytest
  dependency-version: 9.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

poetry.lock

@@ -10,7 +10,7 @@ python = "<3.14,>=3.11"
 notebook = ">=7.4,<7.5"
 pytket-quantinuum = ">=0.53,<0.55"
 pytket_pecos = ">=0.2,<0.3"
-pytest = ">=8.4,<8.5"
+pytest = ">=8.4,<9.1"
 pytest-cov = ">=6.2,<7.1"
 ruff = ">=0.12,<0.15"
 mypy = ">=1.17,<1.19"