🐛 Describe the bug
Using the colab notebook "02_models.ipynb", I encountered this error while executing the 2nd code block in the statement, "from avalanche.models import SimpleCNN".

🐜 To Reproduce
Run the "02_models.ipynd" in Google Colab

🐝 Expected behavior
No Errors and SampleCNN model is printed.

🐞 Screenshots

🦋 Additional context
The error happens in "/usr/local/lib/python3.10/dist-packages/avalanche/models/mobilenetv1.py". The original statements were:
try:
from pytorchcv.models.mobilenet import DwsConvBlock
except Exception:
from pytorchcv.models.common import DwsConvBlock

"DwsConvBlock" is coded in common/conv.py, so the correct code should be:
try:
from pytorchcv.models.mobilenet import DwsConvBlock
except Exception:
from pytorchcv.models.common.conv import DwsConvBlock