make vringar maintainer

maintainers/maintainer-list.nix

···
     name = "Kostas Karachalios";
     githubId = 81346;
   };
+  vringar = {
+    email = "[e-mail]";
+    github = "vringar";
+    name = "Stefan Zabka";
+    githubId = 13276717;
+  };
   vrthra = {
     email = "[e-mail]";
     github = "vrthra";

pkgs/tools/security/ghidra/build-extension.nix

···
 let
   metaCommon = oldMeta:
     oldMeta // (with lib; {
-      maintainers = (oldMeta.maintainers or []) ++ (with maintainers; [ emilytrau ]);
+      maintainers = (oldMeta.maintainers or []) ++ (with maintainers; [ vringar ]);
       platforms = oldMeta.platforms or ghidra.meta.platforms;
     });
 

pkgs/tools/security/ghidra/build.nix

···
       binaryBytecode  # deps
     ];
     license = licenses.asl20;
-    maintainers = with maintainers; [ roblabla emilytrau ];
+    maintainers = with maintainers; [ roblabla vringar ];
     broken = stdenv.isDarwin && stdenv.isx86_64;
   };