fix: embed colors in page loader to fix regression

[github-actions[bot]]

🔗 Code Coverage Report for go-test-app-01/ at 33bfff0f5757b4c093fa031f1c60dd88b5e3a0b5

📔 Total: 70.0%
🎯 Threshold: 66.7%
✅ 70.0% >= 66.7%

Full coverage report

``` cointoss/main.go:10: main 75.0% cointoss/main.go:20: tossCoin 66.7% cointoss/main.go:28: maybe 66.7% total: (statements) 70.0% ```

^{go-beautiful-html-coverage ↗}

[github-actions[bot]]

🔗 Code Coverage Report for go-test-app-02/ at 33bfff0f5757b4c093fa031f1c60dd88b5e3a0b5

📔 Total: 70.0%

Full coverage report

``` cointoss/main.go:10: main 75.0% cointoss/main.go:20: tossCoin 66.7% cointoss/main.go:28: maybe 66.7% total: (statements) 70.0% ```

^{go-beautiful-html-coverage ↗}