update README

Author: xugaoxiang

README.md

@@ -6,23 +6,23 @@
 
 * p03_使用`QtDesigner`设计`UI`界面  [源码下载](p03_使用QtDesigner设计UI界面)  [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-3-qtdesigner/)
 
-* p04_`pyinstaller`打包exe  [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-4-pyinstaller/)
+* p04_`pyinstaller`打包`exe`  [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-4-pyinstaller/)
 
-* p05_定时器QTimer使用    [源码下载](p05_定时器QTimer的使用)    [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-5-qtimer/)
+* p05_定时器`QTimer`使用    [源码下载](p05_定时器QTimer的使用)    [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-5-qtimer/)
 
 * p06_信号和槽  [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-6-signal-slot/)
 
 * p07_`UI`和逻辑分离  [源码下载](p07_UI与逻辑分离)  [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-7-ui-logical/)
 
-* p08_分离UI主线程和工作线程	[源码下载](p08_分离UI主线程和工作线程)  [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-8-main-sub-thread/)
+* p08_分离`UI`主线程和工作线程	[源码下载](p08_分离UI主线程和工作线程)  [博文地址](https://xugaoxiang.com/2019/12/04/pyqt5-8-main-sub-thread/)
 
 * p09_应用程序图标    [博文地址](https://xugaoxiang.com/2020/01/07/pyqt5-app-icon/)
 
 * p10_对话框类控件	[源码下载](p10_QDialog)  [博文地址](https://xugaoxiang.com/2020/04/12/pyqt5-10-dialog/)
 
 * p11_按钮框类控件	[源码下载](p11_QAbstractButton)  [博文地址](https://xugaoxiang.com/2020/04/19/pyqt5-11-button/)
 
-* p12_QThread使用	[源码下载](p12_QThread)  [博文地址](https://xugaoxiang.com/2020/04/23/pyqt5-12-qthread/)
+* p12_`QThread`使用	[源码下载](p12_QThread)  [博文地址](https://xugaoxiang.com/2020/04/23/pyqt5-12-qthread/)
 
 * p16_显示`opencv`图像格式    [源码下载](p16_OpenCV)  [博文地址](https://xugaoxiang.com/2021/04/14/pyqt5-16-opencv/)