Add note in CONTRIBUTING.md about removing merge commits from PRs
Add note in CONTRIBUTING.md about removing merge commits from PRs

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