Update CONTRIBUTING document with better guidelines for larger changes
Update CONTRIBUTING document with better guidelines for larger changes

baldurk/renderdoc,michaelrgb/renderdoc,Zorro666/renderdoc,etnlGD/renderdoc,victor-moya/renderdoc,Lssikkes/renderdoc,Yours3lf/renderdoc,Anteru/renderdoc,Anteru/renderdoc,Velro/renderdoc,Anteru/renderdoc,cgmb/renderdoc,Lssikkes/renderdoc,victor-moya/renderdoc,Yours3lf/renderdoc,Lssikkes/renderdoc,Anteru/renderdoc,Velro/renderdoc,michaelrgb/renderdoc,Yours3lf/renderdoc,Zorro666/renderdoc,Velro/renderdoc,Lssikkes/renderdoc,cgmb/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,Lssikkes/renderdoc,Lssikkes/renderdoc,baldurk/renderdoc,michaelrgb/renderdoc,googlestadia/renderdoc,etnlGD/renderdoc,Velro/renderdoc,TurtleRockStudios/renderdoc_public,Yours3lf/renderdoc,etnlGD/renderdoc,Velro/renderdoc,victor-moya/renderdoc,baldurk/renderdoc,Zorro666/renderdoc,googlestadia/renderdoc,Anteru/renderdoc,Anteru/renderdoc,etnlGD/renderdoc,Anteru/renderdoc,etnlGD/renderdoc,googlestadia/renderdoc,googlestadia/renderdoc,baldurk/renderdoc,TurtleRockStudios/renderdoc_public,Yours3lf/renderdoc,TurtleRockStudios/renderdoc_public,googlestadia/renderdoc,michaelrgb/renderdoc,Velro/renderdoc,michaelrgb/renderdoc,Zorro666/renderdoc,TurtleRockStudios/renderdoc_public,TurtleRockStudios/renderdoc_public,cgmb/renderdoc,cgmb/renderdoc,Zorro666/renderdoc,victor-moya/renderdoc,googlestadia/renderdoc,victor-moya/renderdoc,etnlGD/renderdoc,Yours3lf/renderdoc,cgmb/renderdoc,victor-moya/renderdoc,TurtleRockStudios/renderdoc_public,baldurk/renderdoc