maintainers: add deinferno

maintainers/maintainer-list.nix

···
     github = "deifactor";
     githubId = 30192992;
   };
+  deinferno = {
+    name = "deinferno";
+    email = "[e-mail]";
+    github = "deinferno";
+    githubId = 14363193;
+  };
   fzakaria = {
     name = "Farid Zakaria";
     email = "[e-mail]";