chore(deps): update github artifact actions (major) (sveltejs#1407)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/pkg.pr.new-comment.yml

@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
       - name: Download artifact
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: output
           github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/pkg.pr.new.yml

@@ -35,7 +35,7 @@ jobs:
               : context.payload.after;
             fs.writeFileSync('output.json', JSON.stringify(output), 'utf8');
       - name: Upload output
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: output
           path: ./output.json