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

[mic92-renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
cachix/install-nix-action	action	major	v29 -> v30

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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

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