adjusting broken URLs
adjusting broken URLs

Change-Id: I97f99196494b68d180133cf5465d91c06826f971

GoogleCloudPlatform/tensorflow-without-a-phd,GoogleCloudPlatform/tensorflow-without-a-phd,GoogleCloudPlatform/tensorflow-without-a-phd,GoogleCloudPlatform/tensorflow-without-a-phd