提高了TTS、STT API的错误率

服务提供商已于07:13 UTC解决了根本问题，错误率随即恢复至基准水平。

原文The provider resolved the underlying issue at 07:13 UTC and error rates immediately returned to baseline.

8月3日06:39至07:13（UTC时间），我们上游云服务商出现网络问题，导致文本转语音和语音转文本请求的错误率升高，并出现间歇性连接超时。高峰期，约2%的语音转文本请求和1%的文本转语音请求受到影响；重试的请求通常成功。服务商于07:13（UTC时间）解决了根本问题，错误率随即恢复至基线水平。

原文Between 06:39 and 07:13 UTC on August 3, a network issue at our upstream cloud provider caused elevated error rates and intermittent connection timeouts on Text-to-Speech and Speech-to-Text requests. At peak, approximately 2% of Speech-to-Text and 1% of Text-to-Speech requests were affected; retried requests generally succeeded. The provider resolved the underlying issue at 07:13 UTC and error rates immediately returned to baseline.