maintainers list update

maintainers/maintainer-list.nix

···
     githubId = 220262;
     name = "Ion Mudreac";
   };
+  Mulligansecurity = {
+    email = "[e-mail]";
+    github = "MulliganSecurity";
+    githubId = 196982523;
+    name = "MulliganSecurity";
+  };
   multisn8 = {
     email = "[e-mail]";
     github = "MultisampledNight";