Bumps [cachix/install-nix-action](https://github.com/cachix/install-nix-action) from 31.6.2 to 31.7.0.
- [Release notes](https://github.com/cachix/install-nix-action/releases)
- [Changelog](https://github.com/cachix/install-nix-action/blob/master/RELEASE.md)
- [Commits](
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| .. | ||
| DISCUSSION_TEMPLATE | ||
| ISSUE_TEMPLATE | ||
| scripts | ||
| workflows | ||
| dependabot.yml | ||
| pinact.yml | ||