maintainers: add damhiya

maintainers/maintainer-list.nix

···
     name = "Dov Alperin";
     keys = [ { fingerprint = "4EED 5096 B925 86FA 1101  6673 7F2C 07B9 1B52 BB61"; } ];
   };
+  damhiya = {
+    name = "SoonWon Moon";
+    email = "[e-mail]";
+    github = "damhiya";
+    githubId = 13533446;
+  };
   DamienCassou = {
     email = "[e-mail]";
     github = "DamienCassou";