Bump spring-boot.version from 2.7.3 to 2.7.4

Bumps `spring-boot.version` from 2.7.3 to 2.7.4.

Updates `spring-boot-starter-parent` from 2.7.3 to 2.7.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.7.3...v2.7.4)

Updates `spring-boot-maven-plugin` from 2.7.3 to 2.7.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.7.3...v2.7.4

)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-parent
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot:spring-boot-maven-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>