Merge pull request #187 from mistydemeo/zng_readme_typo

Correct README typo for libz-ng-sys

README-zng.md

@@ -4,7 +4,7 @@ A library for linking zlib-ng (`libz-ng`) to Rust programs natively, rather
 than in zlib-compat mode.
 
 zlib-ng is a high-performance implementation of zlib. zlib-ng supports building
-in two modes: zlib-compat mode, in whih it provides the same API as zlib and
+in two modes: zlib-compat mode, in which it provides the same API as zlib and
 generally works as a drop-in replacement, and native mode, in which it provides
 its own API. The native API is almost identical to the zlib-compat API, except
 that some types use more correct sizes (rather than the sizes required for zlib