Bump cachix/install-nix-action from v12 to v13
Bump cachix/install-nix-action from v12 to v13

Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from v12 to v13.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Commits](https://github.com/cachix/install-nix-action/compare/v12...8d6d5e949675fbadb765c6b1a975047fa5f09b27)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
LeSuisse/vault-gpg-plugin,LeSuisse/vault-gpg-plugin