Fix #15956: error when building with Sphinx 4.5
Fix #15956: error when building with Sphinx 4.5

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