Fix overlay merge command
Fix overlay merge command

Git wants an identity and none is setup on the CI.

JasonGross/coq,ejgallego/coq,gares/coq,JasonGross/coq,silene/coq,coq/coq,gares/coq,coq/coq,gares/coq,Zimmi48/coq,coq/coq,ejgallego/coq,Zimmi48/coq,Zimmi48/coq,SkySkimmer/coq,SkySkimmer/coq,silene/coq,gares/coq,JasonGross/coq,ejgallego/coq,gares/coq,SkySkimmer/coq,JasonGross/coq,silene/coq,coq/coq,Zimmi48/coq,SkySkimmer/coq,ejgallego/coq