This answer record serves as the Vivado 2020.2 Tool Update 1 (2020.2.1) Release Notes, and contains links to information about what is included in the update.
Vivado Design Suite 2020.2 Update 1 is now available, with support for the following devices:
For customers using these devices, Xilinx recommends installing Vivado 2020.2.1.
For other devices, please continue to use Vivado 2020.2.
Downloading and installing Vivado 2020.2 Update 1 (2020.2.1)
Known Issues specific to Vivado 2020.2 Update 1 (2020.2.1)
There are currently no known issues associated with this release.