Spring Batch JDBC depency is needed, not Spring Batch

issue

README.adoc and link for pre-initialized project refer to Spring Batch as depency

However Spring Batch JDBC is needed
(as used in https://github.com/spring-guides/gs-batch-processing/blob/main/complete/pom.xml)

possible solution

change the following in README.adoc

• change link for pre-initialized project to
  https://start.spring.io/#!type=maven-project&groupId=com.example&artifactId=batch-processing&name=batch-processing&description=Demo%20project%20for%20Spring%20Boot&packageName=com.example.batch-processing&dependencies=batch-jdbc,hsql

• change section 'To manually initialize the project:'
  from Click Dependencies and select Spring Batch and HyperSQL Database.
  to Click Dependencies and select Spring Batch JDBC and HyperSQL Database.

Open README.adoc and inspect the pre-initialized project link and the “To manually initialize the project” section. Update both references to use Spring Batch JDBC as specified in the issue, then verify the link and dependency wording match the requested values.