gshogi: use callPackage instead of python3Packages.callPackage

pkgs/top-level/all-packages.nix

···
 
   gscrabble = python3Packages.callPackage ../games/gscrabble { };
 
-  gshogi = python3Packages.callPackage ../games/gshogi { };
+  gshogi = callPackage ../games/gshogi { };
 
   qtads = qt5.callPackage ../games/qtads { };