chore(deps): update cachix/install-nix-action action to v30 - autoclosed

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	major	v27 -> v30

---

Release Notes

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

v30

Compare Source

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

v29

Compare Source

Bumps Nix to 2.24.7

---

Configuration

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

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ 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.

[what-the-diff]

PR Summary

• Updated Caching Action Version
  The version of the cachix/install-nix-action tool used for caching actions, has been updated from v27 to v30. This has been implemented in both build.yaml and nix-fmt-checks.yaml files. Updating the version often means benefiting from improved functionality and bug fixes.