Update cachix/install-nix-action action to v31.10.4

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	patch	v31.10.3 → v31.10.4

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Release Notes

cachix/install-nix-action (cachix/install-nix-action)

v31.10.4

Compare Source

What's Changed

• nix: 2.34.4 -> 2.34.5 by @​github-actions[bot] in #​273
  [SECURITY] Fixes a root privilege escalation vulnerability via sandbox escape GHSA-g3g9-5vj6-r3gj

Full Changelog: cachix/install-nix-action@v31.10.3...v31.10.4

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