Fix Iris CI script
Fix Iris CI script

Also add nice error message when the grep produces an empty result

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