Bump actions/upload-artifact from 4 to 6 (#71)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Elan Hasson <234704+ElanHasson@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-test-package.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Pack
         run: dotnet pack --configuration Release --no-build --output pack/
       - name: Store .NET Package
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: nuget
           if-no-files-found: error