[Update][Fix] ALL 修正版权信息, 更新年份;

[Update] * 更新年份;
[Fix] * 由 AGPLv3-Later 更新为 AGPLv3-Only;

2021, 新年快乐! (新的一年继续努力吧! :D)

ContentGrabbingJi-Command-api/pom.xml

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  ~ Copyright (C) 2020  LamGC
+  ~ Copyright (C) 2021  LamGC
   ~
   ~ ContentGrabbingJi is free software: you can redistribute it and/or modify
   ~ it under the terms of the GNU Affero General Public License as
   ~ published by the Free Software Foundation, either version 3 of the
-  ~ License, or (at your option) any later version.
+  ~ License.
   ~
   ~ ContentGrabbingJi is distributed in the hope that it will be useful,
   ~ but WITHOUT ANY WARRANTY; without even the implied warranty of