CI: do not fail CI if Cywgin Codecov step fails

Author: wilfwilson

.github/workflows/standard.yml

@@ -76,7 +76,7 @@ jobs:
       - uses: codecov/codecov-action@v5
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
-          fail_ci_if_error: true
+          fail_ci_if_error: ${{ runner.os != 'Windows' }}
       - name: "Run GAP's tst/testinstall.g"
         uses: gap-actions/run-pkg-tests@v4
         with: