chore(deps): Bump png from 0.17.13 to 0.17.16

Bumps [png](https://github.com/image-rs/image-png) from 0.17.13 to 0.17.16.
- [Changelog](https://github.com/image-rs/image-png/blob/master/CHANGES.md)
- [Commits](image-rs/image-png@v0.17.13...v0.17.16)

---
updated-dependencies:
- dependency-name: png
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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