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

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	major	v23 -> v26

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Release Notes

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

v26

Compare Source

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

v25: install-nix-action-v25

Compare Source

Nix 2.19.2

v24: install-nix-action-v24

Compare Source

• 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

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Configuration

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