Fix issue with code block on stable audio Learning Path

Author: jasonrandrews

content/learning-paths/mobile-graphics-and-gaming/run-stable-audio-with-executorch/4-build-run-macos.md

@@ -24,11 +24,10 @@ Start a fresh virtual environment to avoid dependency conflicts from earlier ste
 cd $WORKSPACE/ML-examples/kleidiai-examples/audiogen-et/
 python3.10 -m venv new-venv
 source new-venv/bin/activate
+```
 
 Start a fresh virtual environment:
 
-
-
 ```bash
 cd $WORKSPACE/ML-examples/kleidiai-examples/audiogen-et/
 python3.10 -m venv new-venv