Bump actions/download-artifact from 3 to 7 (#99)

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Author: dependabot[bot]

.github/workflows/build.yml

@@ -71,7 +71,7 @@ jobs:
       uses: actions/setup-dotnet@v5
       with:
         dotnet-version: 8.0.x
-    - uses: actions/download-artifact@v3
+    - uses: actions/download-artifact@v7
       with:
         name: artifacts
         path: ./artifacts