maintainers: add gpanders

maintainers/maintainer-list.nix

@@ -4001,6 +4001,16 @@
       fingerprint = "5214 2D39 A7CE F8FA 872B  CA7F DE62 E1E2 A614 5556";
     }];
   };
+  gpanders = {
+    name = "Gregory Anders";
+    email = "greg@gpanders.com";
+    github = "gpanders";
+    githubId = 8965202;
+    keys = [{
+      longkeyid = "rsa2048/0x56E93C2FB6B08BDB";
+      fingerprint = "B9D5 0EDF E95E ECD0 C135  00A9 56E9 3C2F B6B0 8BDB";
+    }];
+  };
   gpyh = {
     email = "yacine.hmito@gmail.com";
     github = "yacinehmito";