Bump pytest-subtests from 0.14.2 to 0.15.0 (#2282)

Bumps [pytest-subtests](https://github.com/pytest-dev/pytest-subtests) from 0.14.2 to 0.15.0.
- [Release notes](https://github.com/pytest-dev/pytest-subtests/releases)
- [Changelog](https://github.com/pytest-dev/pytest-subtests/blob/main/CHANGELOG.rst)
- [Commits](pytest-dev/pytest-subtests@v0.14.2...v0.15.0)

---
updated-dependencies:
- dependency-name: pytest-subtests
  dependency-version: 0.15.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -68,7 +68,7 @@ ruff = ">=0.12,<0.15"
 pytest-cov = ">=6,<8"
 pytest-randomly = ">=3.12,<5.0"
 pytest-mypy-plugins = "^3.1"
-pytest-subtests = "^0.14"
+pytest-subtests = ">=0.14,<0.16"
 pytest-shard = "^0.1"
 covdefaults = "^2.3"