chore(deps): Bump actions/download-artifact from 5 to 6 (#292)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/cd.yaml

@@ -77,7 +77,7 @@ jobs:
       BUCKET: oss://sustech-application
     steps:
       - name: Download build files
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: build-files
           path: dist/
@@ -94,7 +94,7 @@ jobs:
           ./ossutil version
 
       - name: Download diff list
-        uses: actions/download-artifact@v5
+        uses: actions/download-artifact@v6
         with:
           name: diff-list
           path: ./