maintainers: add vigress8

maintainers/maintainer-list.nix

···
     githubId = 5837359;
     name = "Adrian Pistol";
   };
+  vigress8 = {
+    email = "[e-mail]";
+    github = "vigress8";
+    githubId = 150687949;
+    name = "Vigress";
+  };
   vikanezrimaya = {
     email = "[e-mail]";
     github = "vikanezrimaya";