修复导航示例的圆角问题

docs/source/navigation.md

@@ -87,6 +87,6 @@ If you call `NavigationInterface.setExpandWidth()`, the large window width (1008
 ### More examples
 Here is an another style of navigation interface, and its corresponding example program is available at https://github.com/zhiyiYo/PyQt-Fluent-Widgets/tree/master/examples/navigation.
 
-![](_static/NavigationInterfacee.jpg)
+![](_static/NavigationInterface.jpg)
 
 

examples/navigation/resource/dark/demo.qss

@@ -4,6 +4,9 @@ Widget > QLabel {
 
 Widget {
     border: 1px solid rgb(29, 29, 29);
+    border-right: none;
+    border-bottom: none;
+    border-top-left-radius: 10px;
     background-color: rgb(39, 39, 39);
 }