Bump actions/download-artifact from 3 to 4.1.7 in /.github/workflows

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

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

.github/workflows/dotnet.yml

@@ -57,7 +57,7 @@ jobs:
         dotnet-version: 6.0.x
 
     - name: Download Package Files
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4.1.7
       with:
         name: NuGet Package Files (ubuntu-latest)
         path: artifacts
@@ -85,7 +85,7 @@ jobs:
         dotnet-version: 6.0.x
 
     - name: Download Package Files
-      uses: actions/download-artifact@v3
+      uses: actions/download-artifact@v4.1.7
       with:
         name: NuGet Package Files (ubuntu-latest)
         path: artifacts