chore(deps): update actions/upload-artifact action to v7

Author: renovate[bot]

.github/workflows/test.yml

@@ -179,7 +179,7 @@ jobs:
           done
 
       - name: Upload SBOM artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: SBOMs
           path: dotnet-*-root.sbom.spdx