internal/history: remove draft notice, update deployment, add Go 1.23

This change:
Removes the draft notice from go1.23.md
Updates the deployment for golangorg to Go 1.23
Adds Go 1.23 to history/release.go

For golang/go#65614

Change-Id: I5afe34461fdb764b8f9759b0b8d894f72532ecf1
Reviewed-on: https://go-review.googlesource.com/c/website/+/605175
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

_content/doc/go1.23.md

@@ -13,10 +13,12 @@ set fixed-width phrases with non-fixed-width spaces, as in
   main ul li { margin: 0.5em 0; }
 </style>
 
-## DRAFT RELEASE NOTES — Introduction to Go 1.23 {#introduction}
+## Introduction to Go 1.23 {#introduction}
 
-**Go 1.23 is not yet released. These are work-in-progress release notes.
-Go 1.23 is expected to be released in August 2024.**
+The latest Go release, version 1.23, arrives six months after [Go 1.22](/doc/go1.22).
+Most of its changes are in the implementation of the toolchain, runtime, and libraries.
+As always, the release maintains the Go 1 [promise of compatibility](/doc/go1compat).
+We expect almost all Go programs to continue to compile and run as before.
 
 ## Changes to the language {#language}
 

cmd/golangorg/cloudbuild.yaml

@@ -5,7 +5,7 @@
 steps:
   # Clone go repo to _goroot.zip for use by uploaded app.
   - name: gcr.io/cloud-builders/git
-    args: ["clone", "--branch=release-branch.go1.22", "--depth=1", "https://go.googlesource.com/go", "_gotmp"]
+    args: ["clone", "--branch=release-branch.go1.23", "--depth=1", "https://go.googlesource.com/go", "_gotmp"]
   - name: gcr.io/cloud-builders/git
     args: ["archive", "--format=zip", "--output=../_goroot.zip", "HEAD"]
     dir: _gotmp

internal/history/release.go

@@ -13,6 +13,9 @@ import "html/template"
 //
 // The table is sorted by date, breaking ties with newer versions first.
 var Releases = []*Release{
+	{
+		Date: Date{2024, 8, 13}, Version: Version{1, 23, 0},
+	},
 	{
 		Date: Date{2024, 8, 6}, Version: Version{1, 22, 6},
 		Bug: &FixSummary{