build(deps): bump Externals/zlib from 534864b to 3adaa09

Bumps [Externals/zlib](https://github.com/madler/zlib) from `534864b` to `3adaa09`.
- [Release notes](https://github.com/madler/zlib/releases)
- [Commits](madler/zlib@534864b...3adaa09)

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

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