Bump submodule/zlib from d476828 to ef24c4c (#220)

Bumps [submodule/zlib](https://github.com/madler/zlib) from `d476828` to `ef24c4c`.
- [Release notes](https://github.com/madler/zlib/releases)
- [Commits](madler/zlib@d476828...ef24c4c)

---
updated-dependencies:
- dependency-name: submodule/zlib
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>