build: bump zstd submodule

Updated third_party/zstd submodule from v1.5.2 to pre-1.5.5 version.
The new version fixes a rare bug that was introduced in 1.5.0 [1].

A v1.5.5 release version will be produced in March.

1. https://github.com/facebook/zstd/pull/3517

Fixes #8391

NO_DOC=build
NO_TEST=build