bcachefs: Add YellowOnion as maintainer

maintainers/maintainer-list.nix

···
       fingerprint = "FD0A C425 9EF5 4084 F99F 9B47 2ACC 9749 7C68 FAD4";
     }];
   };
+  YellowOnion = {
+    name = "Daniel Hill";
+    email = "[e-mail]";
+    github   = "YellowOnion";
+    githubId = 364160;
+    matrix = "@woobilicious:matrix.org";
+  };
   yesbox = {
     email = "[e-mail]";
     github = "yesbox";

pkgs/os-specific/linux/kernel/linux-testing-bcachefs.nix

···
   extraMeta = {
     branch = "master";
     broken = stdenv.isAarch64;
-    maintainers = with lib.maintainers; [ davidak Madouura pedrohlc raitobezarius ];
+    maintainers = with lib.maintainers; [ davidak Madouura pedrohlc raitobezarius YellowOnion ];
   };
 
   structuredExtraConfig = with lib.kernel; {