Link idle loop doxygen

Author: bulislaw

docs/reference/api/platform/PowerManagement.md

@@ -44,6 +44,9 @@ These Mbed OS drivers can lock the deep sleep:
 
 [![View code](https://www.mbed.com/embed/?url=https://os.mbed.com/teams/mbed_example/code/SleepManager_Example_1/)](https://os.mbed.com/teams/mbed_example/code/SleepManager_Example_1/file/e85412b4147e/main.cpp)
 
+### Function reference
+
+[![View code](https://www.mbed.com/embed/?type=library)](http://os-doc-builder.test.mbed.com/docs/v5.7/mbed-os-api-doxy/mbed__sleep_8h_source.html)
 
 ### Idle loop
 
@@ -61,6 +64,4 @@ void main()
 }
 ```
 
-### Function reference
-
-[![View code](https://www.mbed.com/embed/?type=library)](http://os-doc-builder.test.mbed.com/docs/v5.7/mbed-os-api-doxy/mbed__sleep_8h_source.html)
+[![View code](https://www.mbed.com/embed/?type=library)](https://os.mbed.com/docs/v5.7/mbed-os-api-doxy/group__rtos___idle.html)