maintainers: add lopsided98

maintainers/maintainer-list.nix

···
     github = "lo1tuma";
     name = "Mathias Schreck";
   };
+  lopsided98 = {
+    email = "[e-mail]";
+    github = "lopsided98";
+    name = "Ben Wolsieffer";
+  };
   loskutov = {
     email = "[e-mail]";
     github = "loskutov";