adjust test action. 3

.github/workflows/rust.yml

@@ -23,6 +23,8 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
+        python -m venv venv
+        source venv/bin/activate
         pip install -r requirements.txt
     - name: Build
       run: maturin build --verbose