Prepare release 1.23.1 (#5226)

Author: opentelemetrybot

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## Version 1.23.1 (2023-02-15)
 
 * Fix bug that broke `AutoConfiguredOpenTelemetrySdk`'s shutdown hook.
   ([#5221](https://github.com/open-telemetry/opentelemetry-java/pull/5221))

version.gradle.kts

@@ -1,7 +1,7 @@
 val snapshot = false
 
 allprojects {
-  var ver = "1.23.0"
+  var ver = "1.23.1"
   val release = findProperty("otel.release")
   if (release != null) {
     ver += "-" + release