maintainers: add Jevin Maltais

maintainers/maintainer-list.nix

···
     githubId = 1667473;
     name = "Jethro Kuan";
   };
+  jevy = {
+    email = "[e-mail]";
+    github = "jevy";
+    githubId = 110620;
+    name = "Jevin Maltais";
+  };
   jfb = {
     email = "[e-mail]";
     github = "tftio";