fix okta broken link

Author: lgrateau

authentication/Okta/README.md

@@ -462,7 +462,7 @@ But if you want to execute a bearer authentication ODM runtime call using the Cl
 
 # Troubleshooting
 
-If you encounter any issue, have a look at the [common troubleshooting explanation](../../README.md#troubleshooting)
+If you encounter any issue, have a look at the [common troubleshooting explanation](../README.md#troubleshooting)
 
 # License