poetry: bump pytest from 8.1.1 to 8.3.4

Bumps [pytest](https://github.com/pytest-dev/pytest) from 8.1.1 to 8.3.4.
- [Release notes](https://github.com/pytest-dev/pytest/releases)
- [Changelog](https://github.com/pytest-dev/pytest/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest@8.1.1...8.3.4)

---
updated-dependencies:
- dependency-name: pytest
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -20,7 +20,7 @@ pydantic-settings = "^2.5.2"
 [tool.poetry.group.dev.dependencies]
 layers = {path = "layer", develop = true}
 nrlf-converter = {url = "https://github.com/NHSDigital/nrlf-converter/releases/download/0.0.9/nrlf_converter-0.0.9-py3-none-any.whl"}
-pytest = "^8.1.1"
+pytest = "^8.3.4"
 pytest-mock = "^3.12.0"
 pytest-cov = "^5.0.0"
 boto3 = "^1.34.60"