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	v26 -> v31

---

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 #​232

• nix: 2.24.9 -> 2.25.2 by @​Mic92 in #​218

• ci: fix latest installer tests by @​sandydoo in #​220

• ci: add ubuntu-24.04-arm to matrix by @​msgilligan in #​221

• nix: 2.25.2 -> 2.26.2 by @​Mic92 in #​226

• nix: 2.26.2 -> 2.26.3 by @​sandydoo in #​228

• feat: Pin actions to hashes by @​l0b0 in #​201

• chore(deps): bump actions/checkout from 4.1.1 to 4.2.2 by @​dependabot in #​234

• docs: document how to provide AWS credentials to the nix-daemon by @​sandydoo in #​235

• nix: 2.28.2 -> 2.28.3 by @​Mic92 in #​236

• nix: 2.28.3 -> 2.29.0 by @​Mic92 in #​239
  Release notes: https://nix.dev/manual/nix/latest/release-notes/rl-2.29

• Automate nix updates in CI by @​Mic92 in #​241

• nix: 2.29.0 -> 2.29.1 by @​github-actions in #​243
  [SECURITY] https://discourse.nixos.org/t/security-advisory-privilege-escalations-in-nix-lix-and-guix/66017

• nix: 2.29.1 -> 2.30.0 by @​github-actions in #​244
  Release notes: https://nix.dev/manual/nix/2.30/release-notes/rl-2.30.html

• nix: 2.30.0 -> 2.30.1 by @​xokdvium in #​245
  [SECURITY] Builds with Nix 2.30.0 on macOS were executed with elevated privileges (root), instead of the build users. GHSA-qc7j-jgf3-qmhg

• docs: add example for nix develop by @​jennydaman in #​248

• nix: 2.30.2 -> 2.31.0 by @​github-actions[bot] in #​250
  Release notes: https://discourse.nixos.org/t/nix-2-31-0-released/68465

• nix: 2.31.0 -> 2.31.1 by @​github-actions[bot] in #​253

• nix: 2.31.1 -> 2.31.2 by @​github-actions[bot] in #​256

• feat: set up the environment based on the installer shell scripts by @​sandydoo in #​251
  Adds the bin directory from the user's profile to $PATH.
  Configures the following environment variables:

  • NIX_PROFILES
  • NIX_SSL_CERT_FILE (if not set)

• nix: 2.31.2 -> 2.32.0 by @​github-actions[bot] in #​257
  Release notes: https://discourse.nixos.org/t/nix-2-32-0-released/70528

• nix: 2.32.0 -> 2.32.1 by @​github-actions[bot] in #​258

• nix: 2.32.1 -> 2.32.2 by @​github-actions[bot] in #​259

• nix: 2.32.2 -> 2.32.3 by @​github-actions[bot] in #​260

• nix: 2.32.3 -> 2.32.4 by @​github-actions[bot] in #​261

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

v27

Compare Source

What's Changed

• Enable always-allow-substitutes by default by @​sandydoo in #​207
• nix: 2.20.5 -> 2.22.1 by @​kashw2 in #​206
• ci: fix tests by @​sandydoo in #​208

New Contributors

• @​kashw2 made their first contribution in #​206

Full Changelog: cachix/install-nix-action@v26...V27

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Enabled.

♻ Rebasing: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.