Bump golang to 1.20.6
This MR bumps golang to 1.20.6 which is the latest stable 1.20.x release - https://go.dev/doc/devel/release#go1.20.minor.
Edited by Ash McKenzie
This MR bumps golang to 1.20.6 which is the latest stable 1.20.x release - https://go.dev/doc/devel/release#go1.20.minor.