Bump actions/download-artifact from 2 to 3 (#5574)

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

polkadot/.github/workflows/publish-draft-release.yml

@@ -82,7 +82,7 @@ jobs:
           ruby-version: 3.0.0
 
       - name: Download srtool json output
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v3
 
       - name: Prepare tooling
         run: |
@@ -152,7 +152,7 @@ jobs:
       - name: Checkout sources
         uses: actions/checkout@v3
       - name: Download artifacts
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v3
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1
         with: