maintainers: add foo-dogsquared

maintainers/maintainer-list.nix

···
     githubId = 405105;
     name = "Dustin Frisch";
   };
+  foo-dogsquared = {
+    email = "[e-mail]";
+    github = "foo-dogsquared";
+    githubId = 34962634;
+    name = "Gabriel Arazas";
+  };
   forkk = {
     email = "[e-mail]";
     github = "Forkk";