replace obj models with vec3

test/coders/vec3.cpp

@@ -5,7 +5,7 @@
 
 TEST(VEC3, Decode) {
     auto file = std::filesystem::u8path(
-        "../res/content/base/models/demo.vec3"
+        "../res/content/base/models/block.vec3"
     );
     auto bytes = files::read_bytes_buffer(file);
     auto model = vec3::load(file.u8string(), bytes);