add pytorch to onnx ci test dependency

.github/workflows/frameworks.yml

@@ -499,7 +499,7 @@ jobs:
       - name: Install dependencies
         run: |
           pip install .
-          pip install onnx onnxruntime skl2onnx transformers[onnx]
+          pip install onnx onnxruntime skl2onnx transformers[onnx] torch
           pip install -r requirements/tests-requirements.txt
 
       - name: Run tests and generate coverage report