Merge pull request espnet#4150 from roshansh-cmu/summ

README Update for E2E Speech Summarization espnet#4071

README.md

@@ -78,6 +78,10 @@ ESPnet uses [pytorch](http://pytorch.org/) as a deep learning engine and also fo
   - Set `frontend` to be `s3prl`
   - Select any upstream model by setting the `frontend_conf` to the corresponding name.
 - Streaming Transformer/Conformer ASR with blockwise synchronous beam search.
+- Restricted Self-Attention based on [Longformer](https://arxiv.org/abs/2004.05150) as an encoder for long sequences 
+
+### SUM: Speech Summarization
+- End to End Speech Summarization Recipe for Instructional Videos using Restricted Self-Attention [[Sharma et al., 2022]](https://arxiv.org/abs/2110.06263)
 
 Demonstration
 - Real-time ASR demo with ESPnet2  [![Open In Colab](https://colab.research.google.com/assets/colab-badge.svg)](https://colab.research.google.com/github/espnet/notebook/blob/master/espnet2_asr_realtime_demo.ipynb)