Bump actions/download-artifact from 4.1.9 to 4.2.0 (#617)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4.1.9 to 4.2.0.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4.1.9...v4.2.0)

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

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -158,7 +158,7 @@ jobs:
             8.0.405
             9.0.102
       - name: Download NuGet Artifacts from build-nuget-package job
-        uses: actions/download-artifact@v4.1.9
+        uses: actions/download-artifact@v4.2.0
         with:
           name: nuget-package
           path: NuGetPackage/
@@ -175,7 +175,7 @@ jobs:
     timeout-minutes: 10
     steps:
       - uses: actions/[email protected]
-      - uses: actions/download-artifact@v4.1.9
+      - uses: actions/download-artifact@v4.2.0
         with:
           path: .
       - run: cp bin-alpine-x64/splunk-*.zip ./splunk-opentelemetry-dotnet-linux-musl-x64.zip