Merge pull request #277993 from shard77/add-maintainer

maintainers: add shard7

maintainers/maintainer-list.nix

···
     }];
     name = "Shane Sveller";
   };
+  shard7 = {
+    email = "[e-mail]";
+    github = "shard77";
+    githubId = 106669955;
+    name = "Léon Gessner";
+  };
   shardy = {
     email = "[e-mail]";
     github = "shardulbee";