chore(deps): update cachix/install-nix-action action to v30

Author: renovate[bot]

.github/workflows/general.yml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install nix
-        uses: cachix/install-nix-action@v27
+        uses: cachix/install-nix-action@v30
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}