chore(deps): update actions/setup-node action to v7

Author: renovate[bot]

.github/workflows/pr-release-preview.yml

@@ -18,7 +18,7 @@ jobs:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
           node-version: 26
           cache: npm

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
           # cached GHC settings are image-specific (e.g. linker), keep caches per runner image
           cache-prefix: ${{ env.ImageOS }}-
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v7
         with:
           node-version: 26
           cache: npm