Temporarily fix Moshi test (#11799)

### Summary
Moshi 0.2.5 was released 13 hours ago, breaking our Moshi test which
relies on some old code from 0.2.4. Not sure what the long term fix is,
temporarily pinning Moshi to 0.2.4 to fix the test for now.

Author: jackzhxng

examples/models/moshi/mimi/install_requirements.sh

@@ -7,7 +7,7 @@
 
 set -x
 
-pip install -U moshi
+pip install moshi==0.2.4
 pip install bitsandbytes soundfile
 # Run llama2/install requirements for torchao deps
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )