Add operating system to coverage artifact name.

Author: tasansal

.github/workflows/tests.yml

@@ -99,7 +99,7 @@ jobs:
         if: always() && matrix.session == 'tests'
         uses: actions/upload-artifact@v4
         with:
-          name: coverage-data-${{ matrix.python }}
+          name: coverage-data-${{ matrix.os }}-${{ matrix.python }}
           path: ".coverage.*"
 
       - name: Upload documentation