Update CREDITS on a best-effort basis.
Update CREDITS on a best-effort basis.

And with help from https://github.com/coq/coq/graphs/contributors

ejgallego/coq,JasonGross/coq,coq/coq,ejgallego/coq,gares/coq,gares/coq,maximedenes/coq,coq/coq,coq/coq,letouzey/coq-wip,silene/coq,silene/coq,JasonGross/coq,SkySkimmer/coq,ppedrot/coq,gares/coq,ppedrot/coq,Matafou/coq,Zimmi48/coq,JasonGross/coq,letouzey/coq-wip,silene/coq,ejgallego/coq,Matafou/coq,gares/coq,SkySkimmer/coq,Zimmi48/coq,Zimmi48/coq,letouzey/coq-wip,coq/coq,ppedrot/coq,SkySkimmer/coq,letouzey/coq-wip,Zimmi48/coq,JasonGross/coq,Matafou/coq,SkySkimmer/coq,maximedenes/coq,ppedrot/coq,maximedenes/coq,maximedenes/coq,ppedrot/coq,letouzey/coq-wip,gares/coq,maximedenes/coq,ejgallego/coq