Update document

Author: jdneo

README.md

@@ -110,7 +110,7 @@
   <img src="https://raw.githubusercontent.com/jdneo/vscode-leetcode/master/docs/imgs/session.png" alt="Manage Session" />
 </p>
 
-- To manage your LeetCode sessions, just clicking the `LeetCode: ***` at the bottom of the status bar. You can **switch** between sessions or **create** a new session.
+- To manage your LeetCode sessions, just clicking the `LeetCode: ***` at the bottom of the status bar. You can **switch** between sessions or **create**, **delete** a session.
 
 
 ## Settings

docs/README_zh-CN.md

@@ -110,7 +110,7 @@
   <img src="https://raw.githubusercontent.com/jdneo/vscode-leetcode/master/docs/imgs/session.png" alt="管理存档" />
 </p>
 
-- 点击位于 VS Code 底部状态栏的 `LeetCode: ***` 管理 `LeetCode 存档`。你可以**切换**存档或者**创建**新的存档。
+- 点击位于 VS Code 底部状态栏的 `LeetCode: ***` 管理 `LeetCode 存档`。你可以**切换**存档或者**创建**，**删除**存档。
 
 
 ## 插件配置项