maintainers: add Rishabh5321

Author: Rishabh5321

maintainers/maintainer-list.nix

@@ -20979,6 +20979,12 @@
     githubId = 807447;
     name = "Robert Scott";
   };
+  Rishabh5321 = {
+    name = "Rishabh Singh";
+    email = "[email protected]";
+    github = "Rishabh5321";
+    githubId = 40533251;
+  };
   Rishik-Y = {
     name = "Rishik Yalamanchili";
     email = "[email protected]";