maintainers: add eleina

fix: missing attr key

maintainers/maintainer-list.nix

@@ -7704,6 +7704,13 @@
     githubId = 103082;
     name = "Ed Brindley";
   };
+  eleina = {
+    email = "ellie@eleina.dev";
+    github = "eleinah";
+    githubId = 129979592;
+    name = "Eleina Mironia";
+    keys = [ { fingerprint = "0A86 5F49 90B1 569C B849  5070 2EF4 8A29 49D6 5978"; } ];
+  };
   eleonora = {
     email = "leonsch@protonmail.com";
     github = "42LoCo42";