Bump cachix/install-nix-action from 16 to 21#13

dependabot[bot] wants to merge 1 commit into

maintrusted-programming/tree-grepper:mainfrom

dependabot/github_actions/cachix/install-nix-action-21trusted-programming/tree-grepper:dependabot/github_actions/cachix/install-nix-action-21Copy head branch name to clipboard