Bump actions/download-artifact in the compatible group

Bumps the compatible group with 1 update: [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/download-artifact` from 4.1.9 to 4.2.1
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4.1.9...v4.2.1)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: compatible
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -243,7 +243,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: Download distribution files
-        uses: actions/download-artifact@v4.1.9
+        uses: actions/download-artifact@v4.2.1
         with:
           name: dist-packages
           path: dist
@@ -289,7 +289,7 @@ jobs:
       id-token: write
     steps:
       - name: Download distribution files
-        uses: actions/download-artifact@v4.1.9
+        uses: actions/download-artifact@v4.2.1
         with:
           name: dist-packages
           path: dist