Bump Golang to 1.20.6
This MR updates the required Golang version to 1.20.6
since this version was just released yesterday: https://go.dev/doc/devel/release#go1.20.minor.
Edited by Nao Hashizume
This MR updates the required Golang version to 1.20.6
since this version was just released yesterday: https://go.dev/doc/devel/release#go1.20.minor.