link fix

Author: lindseymoore

source/security/authentication.txt

@@ -462,7 +462,7 @@ in the following example:
    :emphasize-lines: 1, 9
 
 If you need to specify an AWS session token, pass it to the
-`withMechanismProperty() <{+api+}/apidocs/mongodb-driver-core/com/mongodb/MongoCredential.html#withMechanismProperty(java.lang.String,T)>`__
+`withMechanismProperty() <{+core-api+}/com/mongodb/MongoCredential.html#withMechanismProperty(java.lang.String,T)>`__
 method as shown in the following example:
 
 .. literalinclude:: /includes/security/authentication.kt