Bump cachix/cachix-action from 13 to 14

Bumps [cachix/cachix-action](https://github.com/cachix/cachix-action) from 13 to 14.
- [Release notes](https://github.com/cachix/cachix-action/releases)
- [Commits](cachix/cachix-action@v13...v14)

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

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

.github/workflows/dev_envs.yml

@@ -16,7 +16,7 @@ jobs:
         extra_nix_config: |
           access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
 
-    - uses: cachix/cachix-action@v13
+    - uses: cachix/cachix-action@v14
       with:
         name: sourmash-bio
         authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'