Bump actions/download-artifact from 4.1.9 to 4.2.1 (DamienHarper#493)

Bumps [actions/download-artifact](https://github.com/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
...

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/ci-5.x.yml

@@ -201,7 +201,7 @@ jobs:
           fetch-depth: 2
 
       - name: "Download coverage files"
-        uses: "actions/download-artifact@v4.1.9"
+        uses: "actions/download-artifact@v4.2.1"
         with:
           path: "reports"
 

.github/workflows/ci-6.x.yml

@@ -125,7 +125,7 @@ jobs:
           fetch-depth: 2
 
       - name: "Download coverage files"
-        uses: "actions/download-artifact@v4.1.9"
+        uses: "actions/download-artifact@v4.2.1"
         with:
           path: "reports"