Bump org.springframework:spring-framework-bom from 6.2.7 to 6.2.8

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
...

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

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-org-springframework = "6.2.7"
+org-springframework = "6.2.8"
 org-springframework-security = "6.4.6"
 com-fasterxml-jackson = "2.18.4.1"
 nimbus-jose-jwt = "9.47"