Motivation for this change

Trying to add my handle @0x4A6F to maintainers, to contribute to nixpkgs.

Looking forward for inclusion of #34842.

Things done

Adding github handle starting with decimal to maintainers.nix, but this will break nix expression.
nix-repl lib/maintainers.nix

Welcome to Nix version 1.11.16. Type :? for help.

Loading ‘lib/maintainers.nix’...
error: syntax error, unexpected INT, at /home/user/repositories/github.com/0x4A6F/nixpkgs-origin/lib/maintainers.nix:10:3

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.