修正docs中两个README中的PDF下载链接，现在它能直接跳转到最新下载页面

docs/README.md

@@ -91,7 +91,7 @@
 
 &emsp;&emsp; *<strong>本 Hello-Agents PDF 教程完全开源免费。为防止各类营销号加水印后贩卖给多智能体系统初学者，我们特地在 PDF 文件中预先添加了不影响阅读的 Datawhale 开源标志水印，敬请谅解～</strong>*
 
-> *Hello-Agents PDF : https://github.com/datawhalechina/hello-agents/releases/tag/V1.0.0*  
+> *Hello-Agents PDF : https://github.com/datawhalechina/hello-agents/releases/latest/*  
 > *Hello-Agents PDF 国内下载地址 : https://www.datawhale.cn/learn/summary/239* 
 
 ## 💡 如何学习

docs/README_EN.md

@@ -87,7 +87,7 @@
 
 &emsp;&emsp; *<strong>This Hello-Agents PDF tutorial is completely open source and free. To prevent various marketing accounts from adding watermarks and selling it to multi-agent system beginners, we have pre-added Datawhale open-source logo watermarks that do not affect reading in the PDF file. Please understand~</strong>*
 
-> *Hello-Agents PDF: https://github.com/datawhalechina/hello-agents/releases/tag/V1.0.0*  
+> *Hello-Agents PDF: https://github.com/datawhalechina/hello-agents/releases/latest/*  
 > *Hello-Agents PDF domestic download address: https://www.datawhale.cn/learn/summary/239* 
 
 ## 💡 How to Learn