Updated README.md

README.md

@@ -100,8 +100,8 @@ pip install tkintertools==3.0.0b2
 > `tkt 2.*` has been discontinued, for new features, please use `tkt 3.*`. Also note that `tkt 3.*` is almost completely incompatible with `tkt 2.*`, and porting a project from `tkt 2.*` to `tkt 3.*` can be difficult.  
 > `tkt 2.*` 已放弃支持，如需获取新的功能，请使用 `tkt 3.*`。同时请注意，`tkt 3.*` 与 `tkt 2.*` 几乎完全不兼容，将项目从 `tkt 2.*` 移植到 `tkt 3.*` 可能会十分困难。
 
-📦 Dependency packages - 依赖包
--------------------------------
+📦 Dependency - 依赖包
+----------------------
 
 ### 1️⃣ darkdetect