adding custom onboard fix for doc

README.md

@@ -40,7 +40,7 @@ This module is supported in the following bigip and terraform version
 |:point_up: |Users Can explicitly provide password as input to Module using optional Variable "f5_password"|
 |----|---|
 
-|:point_up:  | To use Azure key vault  password,we have to enable the variable "az_key_vault_authentication" to true and supply the variables with key_valut name,secret along with resource group name where azure key vault is defined|
+|:point_up:  | To use Azure key vault  password,we have to enable the variable "az_keyvault_authentication" to true and supply the variables with key_valut name,secret along with resource group name where azure key vault is defined|
 |-----|----|
 
 ## Depreciations