Bump org.springframework.boot:spring-boot-starter (#3378)

Bumps the development-dependencies group with 1 update: [org.springframework.boot:spring-boot-starter](https://github.com/spring-projects/spring-boot).


Updates `org.springframework.boot:spring-boot-starter` from 3.2.7 to 3.2.8
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.2.7...v3.2.8)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: development-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -68,7 +68,7 @@ ext {
 	mockitoVersion = '5.10.0'
 	reactorVersion = '2023.0.8'
 	scalaVersion = '2.13'
-	springBootVersion = '3.2.7' // docs module
+	springBootVersion = '3.2.8' // docs module
 	springDataVersion = '2024.0.2'
 	springRetryVersion = '2.0.7'
 	springVersion = '6.1.11'