Fix CI: regenerate lockfile and bump actions to latest

npm ci was failing because the lockfile was missing optional deps
(@emnapi/core, @emnapi/runtime) that only resolve on Linux. Full
regeneration pulls them in.

Bumps all GitHub Actions to their latest majors:
- actions/checkout v4 → v6
- actions/setup-node v4 → v6
- actions/configure-pages v5 → v6
- actions/upload-pages-artifact v3 → v5
- actions/deploy-pages v4 → v5

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: chtitux

.github/workflows/deploy.yml

@@ -18,19 +18,19 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v6
         with:
           node-version: 20
           cache: npm
 
       - run: npm ci
       - run: npm run build
 
-      - uses: actions/configure-pages@v5
+      - uses: actions/configure-pages@v6
 
-      - uses: actions/upload-pages-artifact@v3
+      - uses: actions/upload-pages-artifact@v5
         with:
           path: dist
 
@@ -42,4 +42,4 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
     steps:
       - id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5