Merge pull request #5772 from simon-michaud/preview

add ReadOnly value to LockLevel param in doc

Author: cormacpayne

src/ResourceManager/Resources/Commands.Resources/help/New-AzureRmResourceLock.md

@@ -185,7 +185,7 @@ Accept wildcard characters: False
 
 ### -LockLevel
 Specifies the level for the lock.
-Currently, the only valid value is CanNotDelete.
+Currently, valid values are CanNotDelete, ReadOnly.
 
 ```yaml
 Type: LockLevel