maintainers: add virchau13

maintainers/maintainer-list.nix

···
     githubId = 118959;
     name = "VinyMeuh";
   };
+  virchau13 = {
+    email = "[e-mail]";
+    github = "virchau13";
+    githubId = 16955157;
+    name = "Vir Chaudhury";
+  };
   viraptor = {
     email = "[e-mail]";
     github = "viraptor";