teams/dotnet: add meenzen (#431566)

maintainers/maintainer-list.nix

@@ -16169,6 +16169,13 @@
     githubId = 318066;
     name = "Mirco Bauer";
   };
+  meenzen = {
+    name = "Samuel Meenzen";
+    email = "samuel@meenzen.net";
+    matrix = "@samuel:mnzn.dev";
+    github = "meenzen";
+    githubId = 22305878;
+  };
   megheaiulian = {
     email = "iulian.meghea@gmail.com";
     github = "megheaiulian";

maintainers/team-list.nix

@@ -309,6 +309,7 @@ with lib.maintainers;
       raphaelr
       jamiemagee
       anpin
+      meenzen
     ];
     scope = "Maintainers of the .NET build tools and packages";
     shortName = "dotnet";