chore(deps): update cachix/install-nix-action action to v29

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	major	v27 -> v29

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Release Notes

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

v29

Compare Source

Bumps Nix to 2.24.8 to fix CVE-2024-47174

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Configuration

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[what-the-diff]

PR Summary

• Updated cachix/install-nix-action version in Prettier Workflow
  The version of a tool we use in our automated code formatting process called cachix/install-nix-action has been updated from v27 to v29. This helps ensure our code layout is consistently neat and readable.