Clarify Debian sid

Author: maximbaz

README.md

@@ -28,7 +28,7 @@ The following operating systems provide a browserpass package that can be instal
 
 -   Arch Linux: [browserpass](https://www.archlinux.org/packages/community/x86_64/browserpass/)
 -   Gentoo Linux: [browserpass](https://packages.gentoo.org/packages/www-plugins/browserpass)
--   Debian: [browserpass](https://packages.debian.org/source/sid/browserpass)
+-   Debian sid: [browserpass](https://packages.debian.org/source/sid/browserpass)
 -   openSUSE Tumbleweed: [browserpass-native](https://software.opensuse.org/package/browserpass-native)
 -   NixOS: [browserpass](https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/security/browserpass/default.nix) - also read [Install on Nix / NixOS](#install-on-nix--nixos)
 -   macOS: [browserpass](https://github.com/Amar1729/homebrew-formulae/blob/master/browserpass.rb) in a user-contributed tap [amar1729/formulae](https://github.com/amar1729/homebrew-formulae)