Go 1.21 Release Candidate 4 is released

[anno...@golang.org]

Hello gophers,

We have just released go1.21rc4, a release candidate version of Go 1.21.
It is cut from release-branch.go1.21 at the revision tagged go1.21rc4.

Please try your production load tests and unit tests with the new version.
Your help testing these pre-release versions is invaluable.

Report any problems using the issue tracker:
https://go.dev/issue/new

If you have Go installed already, an easy way to try go1.21rc4
is by using the go command:
$ go install golang.org/dl/go1.21rc4@latest
$ go1.21rc4 download

You can download binary and source distributions from the usual place:
https://go.dev/dl/#go1.21rc4

To find out what has changed in Go 1.21, read the draft release notes:
https://tip.golang.org/doc/go1.21

Cheers,
David for the Go team