Merge pull request #180572 from thiagokokada/add-matrix-thiagokokada

maintainers: add matrix for thiagokokada

maintainers/maintainer-list.nix

···
     github = "thiagokokada";
     githubId = 844343;
     name = "Thiago K. Okada";
+    matrix = "@k0kada:matrix.org";
   };
   thibaultlemaire = {
     email = "[e-mail]";