coqPackages.addition-chains: enable for Coq 8.16

pkgs/development/coq-modules/addition-chains/default.nix

···
 
   inherit version;
   defaultVersion = with versions; switch coq.coq-version [
-    { case = range "8.13" "8.15"; out = "0.6"; }
+    { case = range "8.13" "8.16"; out = "0.6"; }
     { case = range "8.11" "8.12"; out = "0.4"; }
   ] null;