updated docs

Signed-off-by: Nwusongqing <wusongqing@huawei.com>

en/device-dev/Readme-EN.md

@@ -42,7 +42,7 @@
     - [Mini- and Small-System Devices](guide/device-lite.md)	
     - [Standard-System Devices](guide/device-standard.md)
 - Debugging
-  - [Test Subsystem](subsystems/subsys-testguide-test.md)	
+  - [Testing Subsystem](subsystems/subsys-testguide-test.md)	
   - [R&D Tools](subsystems/subsys-toolchain.md)
 - XTS Certification	
   - [XTS](subsystems/subsys-xts-guide.md)	

en/device-dev/subsystems/Readme-EN.md

@@ -53,7 +53,7 @@
   - [Sensor Usage Guidelines](subsys-sensor-guide.md)
   - [Sensor Usage Example](subsys-sensor-demo.md)
 - [USB](subsys-usbservice.md)
-  - [[USB Overview](subsys-usbservice-overview.md)
+  - [USB Overview](subsys-usbservice-overview.md)
   - [USB Usage Guidelines](subsys-usbservice-guide.md)
   - [USB Usage Example](subsys-usbservice-demo.md)
 - [Application Framework](subsys-application-framework.md)