opencollada-blender: fix homepage url

pkgs/by-name/op/opencollada-blender/package.nix

···
 
   meta = {
     description = "Library for handling the COLLADA file format";
-    homepage = "https://github.com/KhronosGroup/OpenCOLLADA/";
+    homepage = "https://github.com/aras-p/OpenCOLLADA";
     maintainers = [ lib.maintainers.amarshall ];
     platforms = lib.platforms.unix;
     license = lib.licenses.mit;