chore(deps): bump oxipng from 9.1.1 to 9.1.2

Bumps [oxipng](https://github.com/shssoichiro/oxipng) from 9.1.1 to 9.1.2.
- [Release notes](https://github.com/shssoichiro/oxipng/releases)
- [Changelog](https://github.com/shssoichiro/oxipng/blob/master/CHANGELOG.md)
- [Commits](shssoichiro/oxipng@v9.1.1...v9.1.2)

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

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