Bump actions/download-artifact from 4 to 5

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/package.yml

@@ -109,7 +109,7 @@ jobs:
            run: dotnet tool install --global NuGetKeyVaultSignTool
 
          - name: Download Unsigned Packages
-           uses: actions/download-artifact@v4
+           uses: actions/download-artifact@v5
            with: 
                 name: Unsigned
                 path: '${{ github.workspace }}/unsigned' 
@@ -166,7 +166,7 @@ jobs:
          - name: Install .NET Core
            uses: actions/setup-dotnet@v4
          - name: Download Packages
-           uses: actions/download-artifact@v4
+           uses: actions/download-artifact@v5
            with: 
                 name: Signed
                 path: '${{ github.workspace }}/packages'