add readme

README.md

@@ -179,6 +179,7 @@ Via the easy-to-use, efficient, flexible and scalable implementation, our vision
 
 ### Recent Update
 - 🔥 2023.04.06: Add [subtitle file (.srt format) generation example](./demos/streaming_asr_server).
+- 👑 2023.04.25: Add [AMP for U2 conformer](https://github.com/PaddlePaddle/PaddleSpeech/pull/3167).
 - 🔥 2023.03.14: Add SVS(Singing Voice Synthesis) examples with Opencpop dataset, including [DiffSinger](./examples/opencpop/svs1)、[PWGAN](./examples/opencpop/voc1) and [HiFiGAN](./examples/opencpop/voc5), the effect is continuously optimized.
 - 👑 2023.03.09: Add [Wav2vec2ASR-zh](./examples/aishell/asr3).
 - 🎉 2023.03.07: Add [TTS ARM Linux C++ Demo](./demos/TTSArmLinux).

README_cn.md

@@ -184,6 +184,7 @@
 
 ### 近期更新
 - 👑 2023.04.06: 新增 [srt格式字幕生成功能](./demos/streaming_asr_server)。
+- 👑 2023.04.25: 新增 [U2 conformer 的 AMP 训练](https://github.com/PaddlePaddle/PaddleSpeech/pull/3167).
 - 🔥 2023.03.14: 新增基于 Opencpop 数据集的 SVS (歌唱合成) 示例，包含 [DiffSinger](./examples/opencpop/svs1)、[PWGAN](./examples/opencpop/voc1) 和 [HiFiGAN](./examples/opencpop/voc5)，效果持续优化中。
 - 👑 2023.03.09: 新增 [Wav2vec2ASR-zh](./examples/aishell/asr3)。
 - 🎉 2023.03.07: 新增 [TTS ARM Linux C++ 部署示例](./demos/TTSArmLinux)。