Bump springBootVersion from 2.4.5 to 2.5.3

Bumps `springBootVersion` from 2.4.5 to 2.5.3.

Updates `spring-boot-dependencies` from 2.4.5 to 2.5.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.4.5...v2.5.3)

Updates `spring-boot-autoconfigure-processor` from 2.4.5 to 2.5.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.4.5...v2.5.3)

Updates `spring-boot-configuration-processor` from 2.4.5 to 2.5.3
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.4.5...v2.5.3)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-dependencies
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.springframework.boot:spring-boot-autoconfigure-processor
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.springframework.boot:spring-boot-configuration-processor
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle

@@ -15,7 +15,7 @@ ext {
         mybatisSpringVersion = '2.0.6',
         mybatisSpringBootStarterVersion = '2.2.0',
         springVersion = '5.3.7',
-        springBootVersion = '2.4.5',
+        springBootVersion = '2.5.3',
         jsqlparserVersion = '4.1',
         junitVersion = '5.7.2',
     ]