Bump vcpkg from 0.2.13 to 0.2.15
Bumps [vcpkg](https://github.com/mcgoo/vcpkg-rs) from 0.2.13 to 0.2.15.
- [Release notes](https://github.com/mcgoo/vcpkg-rs/releases)
- [Changelog](https://github.com/mcgoo/vcpkg-rs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mcgoo/vcpkg-rs/compare/vcpkg-rs-0.2.13...vcpkg-rs-0.2.15)
---
updated-dependencies:
- dependency-name: vcpkg
dependency-type: indirect
update-type: version-update:semver-patch
...
Signed-off-by: dependabot[bot] <support@github.com>