chore(deps): update cachix/install-nix-action action to v26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	major	v20 -> v26

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Release Notes

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

v26

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Bump to Nix 2.20.5 to address CVE-2024-27297 / GHSA-2ffj-w4mj-pg37.

v25: install-nix-action-v25

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Nix 2.19.2

v24: install-nix-action-v24

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• Nix 2.19.1
• enables KVM on linux
• set TMPDIR to avoid potential disk space issues
• don't use the default GitHub token for Enterprise

v23: install-nix-action-v23

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• always show Nix trace
• Nix 2.17

v22: install-nix-action-v22

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• Nix 2.16.1
• Fix issues with System Integrity Protection when using macos-12

v21: install-nix-action-v21

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• pin Nix to 2.15.1 (recent releases broke too many things)
• fix the action to work on custom containers

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Configuration

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[what-the-diff]

PR Summary

• Updated Action Version in Workflow File
  The version of the cachix/install-nix-action has been updated in our workflow file prettier.yml. This means we are now using a more recent and refined version (v26), from the previously used version (v20). This will lead to improved functionality and performance when the actions are run. It also enables us to leverage any new features or bug fixes introduced in the newer versions.

[github-actions]

Since this pull request has not had any activity within the last 5 days, I have marked it as stale.
I will close it if no further activity occurs within the next 5 days.

[renovate]

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