Copyright: update license year to 2023.

Author: greenrobot-team

README.md

@@ -170,7 +170,7 @@ Besides JVM based languages like Java and Kotlin, ObjectBox also offers:
 
 ## License
 
-    Copyright 2017-2022 ObjectBox Ltd. All rights reserved.
+    Copyright 2017-2023 ObjectBox Ltd. All rights reserved.
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.

objectbox-java/build.gradle

@@ -80,7 +80,7 @@ task javadocForWeb(type: Javadoc) {
 
     title = "ObjectBox Java ${version} API"
     options.overview = "$projectDir/src/web/overview.html"
-    options.bottom = 'Available under the Apache License, Version 2.0 - <i>Copyright &#169; 2017-2022 <a href="https://objectbox.io/">ObjectBox Ltd</a>. All Rights Reserved.</i>'
+    options.bottom = 'Available under the Apache License, Version 2.0 - <i>Copyright &#169; 2017-2023 <a href="https://objectbox.io/">ObjectBox Ltd</a>. All Rights Reserved.</i>'
 
     doLast {
         // Note: frequently check the vanilla stylesheet.css if values still match.