Merge pull request #267112 from amarshall/steam-run-mainprogram

steam-run: Set meta.mainProgram

Changed files
+1
pkgs
games
steam
+1
pkgs/games/steam/fhsenv.nix
···
meta = (steam.meta or {}) // {
description = "Run commands in the same FHS environment that is used for Steam";
+
mainProgram = "steam-run";
name = "steam-run";
};
};