add: peft to the benchmark workflow (#6989)

Author: sayakpaul

.github/workflows/benchmark.yml

@@ -32,7 +32,7 @@ jobs:
         run: |
           apt-get update && apt-get install libsndfile1-dev libgl1 -y
           python -m pip install -e .[quality,test]
-          python -m pip install pandas
+          python -m pip install pandas peft
       - name: Environment
         run: |
           python utils/print_env.py