Update the workflow to not have a secret in it. PAY NO ATTENTION also I'm getting rid of the old secret.

Author: myShoggoth

Diff for: .github/workflows/test.yaml

@@ -14,6 +14,6 @@ jobs:
       with:
         name: mycache
         # If you chose API tokens for write access OR if you have a private cache
-        authToken: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJjJDI3MjEiLCJqdGkiOiJlZDI1YjM5My00NzQ0LTQ5MWUtYjA5YS00NTBhOTJlNTdhMmUiLCJzY29wZXMiOiJjYWNoZSJ9.FA-9_O2yLqt2r7jQ9zRdAIHdXn2uuskQraAXinA9UCY
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
     - run: nix-build
     - run: nix-shell --run "echo OK"