docs(README): clarify licensing

Signed-off-by: Rongrong <i@rong.moe>

README.md

@@ -101,8 +101,26 @@ If you use the [public bot](https://t.me/RSStT_Bot) in your Channel, consider me
 
 Want to preview what the messages sent by RSStT look like? Here is a [list of channels using RSStT](docs/channels-using-rsstt.md).
 
-## License
+## Licensing
 
-This project is licensed under [AGPLv3](LICENSE). Closed-source distribution or bot-hosting are strictly prohibited. If you modify the code and distribute or host it, make sure any users who can use your bot can get the source code (by editing the repo URL in [`src/i18n/__init__.py`](src/i18n/__init__.py)).
+<img src="https://www.gnu.org/graphics/agplv3-with-text-162x68.png" alt="AGPLv3 logo" width="100" align="right">
 
-The repository was formerly a fork of [BoKKeR/RSS-to-Telegram-Bot](https://github.com/BoKKeR/RSS-to-Telegram-Bot). They have been entirely different projects since the early days of this project.
+This project is licensed under [AGPLv3+](LICENSE). Closed-source distribution or bot-hosting are strictly prohibited. If you distribute or host it with code modifications, make sure the source code is available to anyone who can use the bot (by editing the repo URL in [`src/i18n/__init__.py`](src/i18n/__init__.py)).
+
+    RSS to Telegram Bot
+    Copyright (C) 2020-2024  Rongrong <i@rong.moe>
+
+    This program 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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+The repository was forked from [BoKKeR/RSS-to-Telegram-Bot](https://github.com/BoKKeR/RSS-to-Telegram-Bot) in 2020. Since some time in 2021, they share no common codebase and should be considered as completely different projects.

README.zh.md

@@ -102,8 +102,26 @@
 
 想要预览 RSStT 发送的消息的模样吗？这里有一个[使用 RSStT 的频道列表](docs/channels-using-rsstt.md)
 
-## 许可证
+## 许可
 
-本项目根据 [AGPLv3](LICENSE) 授权。严禁闭源的分发或机器人托管。如果你修改了代码并分发或托管它，请确保任何可以使用你的 bot 的用户都可以获得源代码 (通过在 [`src/i18n/__init__.py`](src/i18n/__init__.py) 中编辑仓库 URL)。
+<img src="https://www.gnu.org/graphics/agplv3-with-text-162x68.png" alt="AGPLv3 logo" width="100" align="right">
 
-本仓库原是 [BoKKeR/RSS-to-Telegram-Bot](https://github.com/BoKKeR/RSS-to-Telegram-Bot) 的一个 fork。自本项目的早期开始，它们就已经是完全不同的项目了。
+本项目按 [AGPLv3+](LICENSE) 许可。严禁闭源的分发或机器人托管。如果你分发或托管本项目时带有代码修改，请确保源代码对任何可以使用该 bot 的用户来说均是可取得的 (通过在 [`src/i18n/__init__.py`](src/i18n/__init__.py) 中编辑仓库 URL)。
+
+    RSS to Telegram Bot
+    Copyright (C) 2020-2024  Rongrong <i@rong.moe>
+
+    This program 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.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+本仓库是在 2020 年从 [BoKKeR/RSS-to-Telegram-Bot](https://github.com/BoKKeR/RSS-to-Telegram-Bot) 分叉 (fork) 出来的。自 2021 年的某个时间起，它们不再具有共同的代码库，应当被视为完全不同的项目。