internal/goversion: update Version to 1.23

(The corresponding update for the last release cycle was CL 510735.)

For #40705
For #64340

Change-Id: I123ce68131a6c7b0344cab54cd29402cabb57225
Reviewed-on: https://go-review.googlesource.com/c/go/+/557155
Reviewed-by: Dmitri Shuralyov <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: cagedmantis

src/internal/goversion/goversion.go

@@ -9,4 +9,4 @@ package goversion
 //
 // It should be updated at the start of each development cycle to be
 // the version of the next Go 1.x release. See golang.org/issue/40705.
-const Version = 22
+const Version = 23