maintainers: xokdvium, update email (#427234)

maintainers/maintainer-list.nix

···
     name = "Guillermo NWDD";
   };
   xokdvium = {
-    email = "[e-mail]";
+    email = "[e-mail]";
     github = "xokdvium";
     githubId = 145775305;
     name = "Sergei Zimmerman";