maintainers: add phodina

maintainers/maintainer-list.nix

···
     githubId = 88469;
     name = "Jaime Breva";
   };
+  phodina = {
+    email = "[e-mail]";
+    github = "phodina";
+    githubId = 2997905;
+    name = "Petr Hodina";
+  };
   photex = {
     email = "[e-mail]";
     github = "photex";