Add -y option to apt-get update command.

PiperOrigin-RevId: 348859031
Change-Id: Ie03fa42bfa1168c485f47b6f5c8934f31b95f9c0

Author: hyeygit

tensorflow/tools/ci_build/install/install_pip_packages.sh

@@ -17,7 +17,7 @@
 set -e
 
 sudo add-apt-repository -y ppa:deadsnakes/ppa
-sudo apt-get update
+sudo apt-get -y update
 sudo apt-get install python3.8
 
 # Get the latest version of pip so it recognize manylinux2010