chore: add footer note to pr comments

[github-actions[bot]]

🔗 Code Coverage Report for go-test-app-01/ at b7f5629e042123eb76f979e1c0ea8dd1f2a25c03

📔 Total: 66.7%
🎯 Threshold: 66.7%
✅ 66.7% >= 66.7%

Full coverage report

``` cointoss/main.go:8: main 66.7% cointoss/main.go:16: tossCoin 66.7% total: (statements) 66.7% ```

^{go-beautiful-html-coverage ↗}

[github-actions[bot]]

🔗 Code Coverage Report for go-test-app-02/ at b7f5629e042123eb76f979e1c0ea8dd1f2a25c03

📔 Total: 66.7%

Full coverage report

``` cointoss/main.go:8: main 66.7% cointoss/main.go:16: tossCoin 66.7% total: (statements) 66.7% ```

^{go-beautiful-html-coverage ↗}