[GCP Setup Documentation] The image-project name is incorrect

[likeabbas]

deeplearning-platform-release is now an incorrect image project name in the documentation where you're creating a new instance. This command will start a new VM without a proper boot image.

gcloud compute instances create $INSTANCE_NAME \
    --zone=$ZONE \
    --image-family=$IMAGE_FAMILY \
    --image-project=deeplearning-platform-release \