Update GitHub Artifact Actions

Author: renovate-bot

.github/workflows/ci.yml

@@ -41,7 +41,7 @@ jobs:
         run: dotnet test src --configuration Release --no-build
       - name: Upload packages
         if: matrix.name == 'Linux'
-        uses: actions/upload-artifact@v5.0.0
+        uses: actions/upload-artifact@v6.0.0
         with:
           name: nuget-packages
           path: nugets/
@@ -57,7 +57,7 @@ jobs:
         with:
           dotnet-version: 8.0.x
       - name: Download artifacts
-        uses: actions/download-artifact@v6.0.0
+        uses: actions/download-artifact@v7.0.0
         with:
           name: nuget-packages
           path: nugets/