Clarify GitHub action artifact names

Author: IlyaMuravjov

.github/workflows/test.yml

@@ -46,7 +46,7 @@ jobs:
     - name: Upload coverage report
       uses: actions/upload-artifact@v4
       with:
-        name: coverage-report
+        name: legacy-coverage-report
         path: htmlcov/
 
     - name: Collect diff coverage