Bump filelock from 3.13.1 to 3.15.4

Bumps [filelock](https://github.com/tox-dev/py-filelock) from 3.13.1 to 3.15.4.
- [Release notes](https://github.com/tox-dev/py-filelock/releases)
- [Changelog](https://github.com/tox-dev/filelock/blob/main/docs/changelog.rst)
- [Commits](tox-dev/filelock@3.13.1...3.15.4)

---
updated-dependencies:
- dependency-name: filelock
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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