Change pip install command to include dev dependencies

Updated dependency installation to include dev dependencies.

Author: beckermr

.github/workflows/benchmarks.yaml

@@ -38,8 +38,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install pytest pytest-codspeed
-          python -m pip install .
+          python -m pip install .[dev]
 
       - name: Run benchmarks
         uses: CodSpeedHQ/action@v4