build(deps): bump deps/zlib from 4a5e3e7 to 99b2294

Bumps [deps/zlib](https://github.com/madler/zlib) from `4a5e3e7` to `99b2294`.
- [Release notes](https://github.com/madler/zlib/releases)
- [Commits](madler/zlib@4a5e3e7...99b2294)

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

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