[security] Go 1.19.4 and Go 1.18.9 pre-announcement

[anno...@golang.org]

Hello gophers,

We plan to issue Go 1.19.4 and Go 1.18.9 during US business hours on Tuesday, December 6.

These minor releases include PRIVATE security fixes to the standard library.

Following our security policy, this is the pre-announcement of those releases.

Thanks,
Jenny and Cherry for the Go team