vengi-tools: update homepage

pkgs/applications/graphics/vengi-tools/default.nix

···
   version = "0.0.34";
 
   src = fetchFromGitHub {
-    owner = "mgerhardy";
+    owner = "vengi-voxel";
     repo = "vengi";
     rev = "v${finalAttrs.version}";
     hash = "sha256-a78Oiwln3vyzCyjNewbK1/05bnGcSixxzKIgz4oiDmA=";
···
       filemanager and a command line tool to convert between several voxel
       formats.
     '';
-    homepage = "https://mgerhardy.github.io/vengi/";
-    downloadPage = "https://github.com/mgerhardy/vengi/releases";
+    homepage = "https://vengi-voxel.github.io/vengi/";
+    downloadPage = "https://github.com/vengi-voxel/vengi/releases";
     license = [
       licenses.mit
       licenses.cc-by-sa-30