Bump actions/download-artifact from 2 to 3 (#120)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 3.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v3)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  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>

.github/workflows/CD.yml

@@ -43,7 +43,7 @@ jobs:
         uses: actions/checkout@v3
         with:
           ref: docs
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
       - name: Copy files to /
         run: cp -r artifact/* . && rm -Rf artifact/*
       - name: Config git