Quickstarts : Improve `it/spring-boot-with-jib` integration test

[rohanKanojia]

Description

Related to https://github.com/fabric8io/docker-maven-plugin/issues/1762

Just like we improved samples/spring-boot-with-jib similar changes need to be done in integration test module as well. We have similar project in it/ folder.

https://github.com/fabric8io/docker-maven-plugin/blob/fc53963fc57c466dc10757ac98d2009927f6ef15/it/spring-boot-with-jib/pom.xml#L36

Acceptance Criteria

• [ ] Spring Boot version is updated to 2.7.x
• [ ] Replace org.springframework.web.bind.annotation.RequestMapping with more specific org.springframework.web.bind.annotation.GetMapping

[rohanKanojia]

@mdxabu : Could you please review this issue and see if it's clear enough to pick up?

[mdxabu]

@mdxabu : Could you please review this issue and see if it's clear enough to pick up?

Yes, I can pick this issue