v1.2.12_jtk.1
(bf55d56b068467329f5a6f29bee31bc80d694023)

https://github.com/jtkukunas/zlib/releases/tag/v1.2.12_jtk.1

Note: This library does not use a standard release lifecycle.
      We're pointing to the latest available tagged version at the time we forked the code.

We have also cherry-picked into our local copy:
https://github.com/madler/zlib/commit/7ecf7c7458578d05a20fa481436dd5c58db112f7

And applied by hand the deflate_quick.c change from this commit:
https://github.com/dotnet/runtime/commit/60f6129b3eaef088f4b1ddc30d3320a68f396d85
