Bump actions/download-artifact from 6 to 7

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/push-nuget.yml

@@ -85,7 +85,7 @@ jobs:
 
     steps:
     - name: Get artifacts
-      uses: actions/download-artifact@v6
+      uses: actions/download-artifact@v7
       with:
         name: nuget
         path: ${{ github.workspace }}/publish