#917-modified the L208 to have modified to have 'current' in place of…

… '4.0.x' in the link

docs/modules/ROOT/pages/batch.adoc

@@ -205,7 +205,7 @@ Batch/Boot behavior. Keep in mind that a task is a boot application and that the
 returned from the task is the same as a boot application.
 To override this behavior and allow the task to return an exit code other than zero when a
 batch job returns an
-https://docs.spring.io/spring-batch/4.0.x/reference/html/step.html#batchStatusVsExitStatus[BatchStatus]
+https://docs.spring.io/spring-batch/current/reference/html/step.html#batchStatusVsExitStatus[BatchStatus]
 of `FAILED`, set `spring.cloud.task.batch.fail-on-job-failure` to `true`. Then the exit code
 can be 1 (the default) or be based on the
 https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-spring-application.html#boot-features-application-exit[specified