CI category_theory: use build:base to match equations
CI category_theory: use build:base to match equations

SkySkimmer/coq,ejgallego/coq,SkySkimmer/coq,ejgallego/coq,coq/coq,Zimmi48/coq,Zimmi48/coq,SkySkimmer/coq,coq/coq,Zimmi48/coq,coq/coq,ejgallego/coq,coq/coq,SkySkimmer/coq,ejgallego/coq,Zimmi48/coq