maintainers: add pingiun

maintainers/maintainer-list.nix

@@ -5093,6 +5093,16 @@
     githubId = 1179566;
     name = "Nicolas B. Pierron";
   };
+  pingiun = {
+    email = "nixos@pingiun.com";
+    github = "pingiun";
+    githubId = 1576660;
+    name = "Jelle Besseling";
+    keys = [{
+      longkeyid = "rsa4096/0x9712452E8BE3372E";
+      fingerprint = "A3A3 65AE 16ED A7A0 C29C  88F1 9712 452E 8BE3 372E";
+    }];
+  };
   piotr = {
     email = "ppietrasa@gmail.com";
     name = "Piotr Pietraszkiewicz";