Upgrade CPU image to TF to 2.12 (#209)

Upgraded cpu tf version to unblock build

Author: calderjo

Dockerfile

@@ -47,7 +47,7 @@ RUN R -e "reticulate::conda_create(envname = \"${ENV_NAME}\", conda = \"auto\",
 ENV RETICULATE_PYTHON="${MINICONDA_PATH}/envs/${ENV_NAME}/bin/python"
 
 # Tensorflow and Keras
-ARG TENSORFLOW_VERSION=2.11.0
+ARG TENSORFLOW_VERSION=2.12.0
 RUN R -e "keras::install_keras(tensorflow = \"${TENSORFLOW_VERSION}\", extra_packages = c(\"pandas\", \"numpy\", \"pycryptodome\"), method=\"conda\", envname=\"${ENV_NAME}\")"
 
 # Install kaggle libraries.