updated dockerfile

Author: sandeepgupta12

.github/workflows/Dockerfile.ppc64le

@@ -15,6 +15,8 @@ RUN ln -sf /usr/bin/python3 /usr/bin/python && \
 # Install Python packages via pip
 RUN pip install wheel setuptools pyyaml typing_extensions expecttest
 
+RUN pip install -r requirements.txt
+
 # Copy the PyTorch source code into the container
 COPY . /workspace/pytorch