Fix memory leak in UnloadModel() (#5907)

src/rmodels.c

@@ -1222,6 +1222,8 @@ void UnloadModel(Model model)
     // Unload animation data
     RL_FREE(model.skeleton.bones);
     RL_FREE(model.skeleton.bindPose);
+    RL_FREE(model.currentPose);
+    RL_FREE(model.boneMatrices);
 
     TRACELOG(LOG_INFO, "MODEL: Unloaded model (and meshes) from RAM and VRAM");
 }