Technology licenses allow an organisation or person to make use of some technology that might be protected by a variety of intellectual property, including patents. It is primarily involved in the act of permitting a target organisation to do something with the permission of the grantor of the license. It can have an up-skilling function, but that is generally secondary to the licensing of the rights themselves.
Technology transfer is a broader concept that seeks to enable a target organisation to up-skill on a technology. It could involve a technology license as well (including patents), but its primary focus is to educate a target organisation in a technology to either get a product to market or to create an industry or an academic impetus.