Andy Wilkinson f584d6dbd9 Replace @EnableBatchProcessing in slice test examples
Using `@EnableBatchProcessing` is no longer necessary to enable
Batch's auto-configuration so it's no longer a good example when
discussing sliced tests and user configuration.

This commit replaces `@EnableBatchProcessing` with an alternative
annotation, `@EnableMongoAuditing` and updates the accompanying
text.

Closes gh-33435
2023-06-21 12:41:28 +01:00
..