Bump org.springframework:spring-framework-bom from 6.2.7 to 6.2.8 (#3967)

Bumps [org.springframework:spring-framework-bom](https://github.com/spring-projects/spring-framework) from 6.2.7 to 6.2.8.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v6.2.7...v6.2.8)

---
updated-dependencies:
- dependency-name: org.springframework:spring-framework-bom
  dependency-version: 6.2.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -70,7 +70,7 @@ ext {
 	springBootVersion = '3.3.12' // docs module
 	springDataVersion = '2024.1.6'
 	springRetryVersion = '2.0.12'
-	springVersion = '6.2.7'
+	springVersion = '6.2.8'
 	zookeeperVersion = '3.8.4'
 
 	idPrefix = 'kafka'