loongson/pypi: links for keras-webhook-callback

loongson/mirror keras_webhook_callback-0.2.3.tar.gz
loongson/mirror keras_webhook_callback-0.2.2.tar.gz
loongson/mirror keras_webhook_callback-0.2.1.tar.gz
loongson/mirror keras_webhook_callback-0.2.tar.gz
loongson/mirror keras_webhook_callback-0.1.tar.gz