Update DeterminateSystems/nix-installer-action action to v14

| datasource  | package                                 | from | to  |
| ----------- | --------------------------------------- | ---- | --- |
| github-tags | DeterminateSystems/nix-installer-action | v11  | v14 |

Author: renovate[bot]

.github/workflows/release-phar.yml

@@ -22,7 +22,7 @@ jobs:
       - name: "Checkout"
         uses: "actions/checkout@v4"
 
-      - uses: DeterminateSystems/nix-installer-action@v11
+      - uses: DeterminateSystems/nix-installer-action@v14
 
       - name: "Build PHAR"
         run: |