Bump cachix/cachix-action from 15 to 17

Bumps [cachix/cachix-action](https://github.com/cachix/cachix-action) from 15 to 17.
- [Release notes](https://github.com/cachix/cachix-action/releases)
- [Changelog](https://github.com/cachix/cachix-action/blob/master/RELEASE.md)
- [Commits](cachix/cachix-action@ad2ddac...5f2d7c5)

---
updated-dependencies:
- dependency-name: cachix/cachix-action
  dependency-version: '17'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/integration_gauntlet.yml

@@ -23,7 +23,7 @@ jobs:
           nix_path: nixpkgs=channel:nixos-unstable
           extra_nix_config: "sandbox = false"
       - name: Cache Nix
-        uses: cachix/cachix-action@ad2ddac53f961de1989924296a1f236fcfbaa4fc
+        uses: cachix/cachix-action@5f2d7c5294214f71b873db4b969586b980625e71
         with:
           name: chainlink-cosmos
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"