build(deps): bump prettyplease from 0.1.11 to 0.1.15

Bumps [prettyplease](https://github.com/dtolnay/prettyplease) from 0.1.11 to 0.1.15.
- [Release notes](https://github.com/dtolnay/prettyplease/releases)
- [Commits](dtolnay/prettyplease@0.1.11...0.1.15)

---
updated-dependencies:
- dependency-name: prettyplease
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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