Bump cspell from 8.15.1 to 8.15.4

Bumps [cspell](https://github.com/streetsidesoftware/cspell/tree/HEAD/packages/cspell) from 8.15.1 to 8.15.4.
- [Release notes](https://github.com/streetsidesoftware/cspell/releases)
- [Changelog](https://github.com/streetsidesoftware/cspell/blob/main/packages/cspell/CHANGELOG.md)
- [Commits](https://github.com/streetsidesoftware/cspell/commits/v8.15.4/packages/cspell)

---
updated-dependencies:
- dependency-name: cspell
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>