Bump actions/download-artifact from 3 to 7

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...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/build.yml

@@ -71,7 +71,7 @@ jobs:
       uses: actions/setup-dotnet@v3
       with:
         dotnet-version: 8.0.x
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v7
       with:
         name: artifacts
         path: ./artifacts