Bump actions/download-artifact from 5 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -152,13 +152,13 @@ jobs:
         with:
           node-version: 22
       - run: npm ci
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: dist
           path: dist
       - working-directory: ./example
         run: npm install
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: example-app
           path: example/out
@@ -188,7 +188,7 @@ jobs:
           registry-url: https://registry.npmjs.org/
           node-version: 22
       - run: npm ci
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: dist
           path: dist