synthv1: 0.9.2 -> 0.9.3

* synthv1: 0.9.2 -> 0.9.3 (#50553)

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/synthv1/versions

* synthv1: refresh meta.homepage