all: upgrade go directive to at least 1.23.0 [generated]

By now Go 1.24.0 has been released, and Go 1.22 is no longer supported
per the Go Release Policy (https://go.dev/doc/devel/release#policy).

For golang/go#69095.

[git-generate]
(cd . && go get go@1.23.0 && go mod tidy && go fix ./... && go mod edit -toolchain=none)

Change-Id: Iaeb32276091bcf93b9f9ccde96e2705fe6367860
Reviewed-on: https://go-review.googlesource.com/c/time/+/649718
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Gopher Robot <gobot@golang.org>

Author: gopherbot

go.mod

@@ -1,3 +1,3 @@
 module golang.org/x/time
 
-go 1.18
+go 1.23.0