Bump prettier in /packages/npm-packages/ruby-wasm-wasi

Bumps [prettier](https://github.com/prettier/prettier) from 2.8.1 to 2.8.7.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@2.8.1...2.8.7)

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

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

Author: dependabot[bot]