Feature Parquet in the "Zstandard is used by :" section

**Is your feature request related to a problem? Please describe.**

Parquet is not listed in the "Zstandard is used by :" section of https://facebook.github.io/zstd/

**Describe the solution you'd like**

Add Parquet (which uses zstd as a compression algorithm: https://parquet.apache.org/docs/file-format/data-pages/compression/) to the list.

**Describe alternatives you've considered**

Not listing it