fixed internal readme links

Author: Offir Kochalsky

README.md

@@ -148,5 +148,5 @@ kv_reset -> 0
 If you have problems, you can review the [documentation](https://os.mbed.com/docs/latest/tutorials/debugging.html)
 for suggestions on what could be wrong and how to fix it.
 
-## Default Global KVStore Configuration
-The Global KVStore APIs rely on the higher level Mbes-OS KVSTore retargetting layer [json configuration](https://github.com/ARMmbed/mbed-os/blob/master/features/storage/kvstore/conf/mbed_lib.json)
+## KVStore Configuration
+The Global KVStore API options can be set up in the higher level Mbes-OS KVSTore retargetting layer [json configuration](https://github.com/ARMmbed/mbed-os/blob/master/features/storage/kvstore/conf/mbed_lib.json)