完善 specification/logs 文件夹内文章翻译

[noobone]

原文地址：https://opentelemetry.io/docs/reference/specification/logs/overview/ 原文档仓库地址：https://github.com/open-telemetry/opentelemetry-specification/tree/main/specification/logs 翻译输出文件夹：https://github.com/open-telemetry/docs-cn/tree/main/specification/logs

• [ ] README.md
• [ ] data-model.md
• [ ] logging-library-sdk.md
• [ ] semantic_conventions