Bump actions/download-artifact from 6 to 7 (#325)

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -94,7 +94,7 @@ jobs:
       with:
         dotnet-version: |
           10.0.x
-    - uses: actions/download-artifact@v6
+    - uses: actions/download-artifact@v7
       with:
         name: artifacts
         path: ./artifacts