chore(deps): update cachix/install-nix-action action to v31

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	major	v27 -> v31

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Release Notes

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

v31

Compare Source

Starting with v31, this action will use semantic versioning for releases.
Major tags, like v31, will be bumped to point to the latest minor/patch release.
This is in line with how most GitHub actions manage releases.

What's Changed

• nix: 2.26.3 -> 2.28.2 by @​Mic92 in https://github.com/cachix/install-nix-action/pull/232
• nix: 2.24.9 -> 2.25.2 by @​Mic92 in https://github.com/cachix/install-nix-action/pull/218
• ci: fix latest installer tests by @​sandydoo in https://github.com/cachix/install-nix-action/pull/220
• ci: add ubuntu-24.04-arm to matrix by @​msgilligan in https://github.com/cachix/install-nix-action/pull/221
• nix: 2.25.2 -> 2.26.2 by @​Mic92 in https://github.com/cachix/install-nix-action/pull/226
• nix: 2.26.2 -> 2.26.3 by @​sandydoo in https://github.com/cachix/install-nix-action/pull/228
• feat: Pin actions to hashes by @​l0b0 in https://github.com/cachix/install-nix-action/pull/201
• chore(deps): bump actions/checkout from 4.1.1 to 4.2.2 by @​dependabot in https://github.com/cachix/install-nix-action/pull/234
• docs: document how to provide AWS credentials to the nix-daemon by @​sandydoo in https://github.com/cachix/install-nix-action/pull/235
• nix: 2.28.2 -> 2.28.3 by @​Mic92 in https://github.com/cachix/install-nix-action/pull/236
• nix: 2.28.3 -> 2.29.0 by @​Mic92 in https://github.com/cachix/install-nix-action/pull/239
  Release notes: https://nix.dev/manual/nix/latest/release-notes/rl-2.29
• Automate nix updates in CI by @​Mic92 in https://github.com/cachix/install-nix-action/pull/241
• nix: 2.29.0 -> 2.29.1 by @​github-actions in https://github.com/cachix/install-nix-action/pull/243
  [SECURITY] https://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017

New Contributors

• @​msgilligan made their first contribution in https://github.com/cachix/install-nix-action/pull/221
• @​github-actions made their first contribution in https://github.com/cachix/install-nix-action/pull/243

Full Changelog: cachix/install-nix-action@v30...v31

v30

Compare Source

• Nix: 2.24.7 -> 2.24.9, fixing GHSA-6fjr-mq49-mm2c

v29

Compare Source

Bumps Nix to 2.24.7

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