Bump cachix/install-nix-action from V27 to 28

[dependabot[bot]]

Bumps cachix/install-nix-action from V27 to 28. This release includes the previously tagged commit.

Release notes

Sourced from cachix/install-nix-action's releases.

v28

Nix 2.24.6 - https://github.com/NixOS/nix/security/advisories/GHSA-h4vv-h3jq-v493

Commits

• 3715ab1 bump channel
• 1872f1f Nix: 2.22.1 -> 2.24.6
• e268b7a Merge pull request #213 from phaer/patch-1
• 5b8c65d Update README: hardware accel is available now...
• ba01fff Merge pull request #210 from guoard/patch-1
• 474f0a7 docs(readme): update checkout action version
• 7259822 readme: V27
• See full diff in compare view

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