Error return value of `f.WriteString` is not checked (errcheck)

directive `// nolint:unparam` should be written without leading space as `//nolint:unparam` (nolintlint)

issues found

Restore cache failed: Dependencies file is not found in /home/runner/work/gin-static/gin-static. Supported file pattern: go.sum

Codecov: Failed to properly create commit: The process '/home/runner/work/_actions/codecov/codecov-action/v4/dist/codecov' failed with exit code 1