Update copyright in README and code template to 2023

.idea/copyright/Mamoe_mirai.xml

@@ -1,7 +1,7 @@
 <component name="CopyrightManager">
   <copyright>
-    <option name="allowReplaceRegexp" value="20..\-20(?!22).." />
-    <option name="notice" value="Copyright 2019-2022 Mamoe Technologies and contributors.&#10;&#10;此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.&#10;Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.&#10;&#10;https://github.com/mamoe/mirai/blob/dev/LICENSE" />
+    <option name="allowReplaceRegexp" value="20..\-20(?!23).." />
+    <option name="notice" value="Copyright 2019-2023 Mamoe Technologies and contributors.&#10;&#10;此源代码的使用受 GNU AFFERO GENERAL PUBLIC LICENSE version 3 许可证的约束, 可以在以下链接找到该许可证.&#10;Use of this source code is governed by the GNU AGPLv3 license that can be found through the following link.&#10;&#10;https://github.com/mamoe/mirai/blob/dev/LICENSE" />
     <option name="myName" value="Mamoe/mirai" />
   </copyright>
 </component>

README.md

@@ -31,7 +31,7 @@ mirai 是一个在全平台下运行，提供 QQ Android 协议支持的高效
 
 ### 许可证
 
-    Copyright (C) 2019-2022 Mamoe Technologies and contributors.
+    Copyright (C) 2019-2023 Mamoe Technologies and contributors.
 
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU Affero General Public License as