Update benchmarks.yml

Author: juliagmt-google

.github/workflows/benchmarks.yml

@@ -55,10 +55,10 @@ jobs:
         run: python -m pip install --upgrade pip setuptools wheel
 
       - name: Create and activate virtual environment
-        working-directory: xla
+        shell: bash  # Force the use of bash
         run: |
-          python -m venv xla/venv   # Create venv inside the xla directory
-          source xla/venv/bin/activate  # Activate the environment
+          python -m venv xla/venv
+          source xla/venv/bin/activate
 
       - name: Run setup.sh for E2E benchmarks flax_2b (within venv)
         working-directory: xla/xla/backends/cpu/benchmarks/e2e/gemma2/flax_2b