README.md: Make nixpkgs the primary way to get the package
Dependencies
- [2]
SNHMHWHLAdd reference to nix-extras package - [3]
6PXIKDCNAdd note about runtime dependency on Pijul - [4]
NQT3HEZHAdd README.md
Change contents
- replacement in README.md at line 33
The package is available as part of my *nix-extras* flake:The package is available in nixpkgs: - replacement in README.md at line 36
% nix build sourcehut:~dblsaiko/nix-extras#nix-plugin-pijul% nix build nixpkgs#nix-plugin-pijul - edit in README.md at line 44
The package is also available as part of my *nix-extras* flake: - edit in README.md at line 47
```% nix build sourcehut:~dblsaiko/nix-extras#nix-plugin-pijul```