maintainers: add deadbaed

maintainers/maintainer-list.nix

···
     githubId = 130508846;
     name = "Elliot Cameron";
   };
+  deadbaed = {
+    name = "Philippe Loctaux";
+    github = "deadbaed";
+    githubId = 8809909;
+  };
   dearrude = {
     name = "Ebrahim Nejati";
     email = "[e-mail]";