fix model tests (#2604)

upgrade transformers and peft in CI

.github/workflows/unit_tests.yml

@@ -85,5 +85,6 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -e '.[dev,optimum,deepsparse,sparseml,api]' --extra-index-url https://download.pytorch.org/whl/cpu
+        pip install -U transformers peft
     - name: Test with pytest
       run: python -m pytest tests/models --showlocals -s -vv