Fix the secondary maintainer for Makefile.
Fix the secondary maintainer for Makefile.

Closes #7345.

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