Add tutorial link to AVSR recipe (#3532)

Summary: Pull Request resolved: https://github.com/pytorch/audio/pull/3532

Reviewed By: mthrok

Differential Revision: D48165499

Pulled By: mpc001

fbshipit-source-id: c87b3361f0e6282684f218b32888df883d56682b

examples/avsr/README.md

@@ -12,7 +12,7 @@
 
 This directory contains the training recipe for real-time audio, visual, and audio-visual speech recognition (ASR, VSR, AV-ASR) models, which is an extension of [Auto-AVSR](https://arxiv.org/abs/2303.14307).
 
-Please refer to [this tutorial]() for real-time AV-ASR inference from microphone and camera.
+Please refer to [this tutorial](https://pytorch.org/audio/main/tutorials/device_avsr.html) for real-time AV-ASR inference from microphone and camera.
 
 ## Preparation