Update provided Zstd to 1.5.5
CMake comes with a copy of Zstandard. It is version 1.5.0 from May 2021. The most recent upstream version of Zstandard is 1.5.5 from April 2023.
It comes with performance improvements and other fixes, e.g., it would include a fix for #22610 (closed) (upstream issue)
Edited by Brad King