Fix dead link in README.md

Author: oneonestar

README.md

@@ -45,7 +45,7 @@ uncompressed = uncompressed.asSlice(0, uncompressedSize);
 
 # Algorithms
 
-## [Zstandard (Zstd)](https://www.zstd.net/) **(Recommended)**
+## [Zstandard (Zstd)](https://facebook.github.io/zstd) **(Recommended)**
 Zstandard is the recommended algorithm for most compression. It provides
 superior compression and performance at all levels compared to zlib. Zstandard is
 an excellent choice for most use cases, especially storage and bandwidth constrained