Bump org.springframework.boot from 3.2.6 to 3.2.8

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.2.6 to 3.2.8.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.2.6...v3.2.8)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-org-springframework-boot = "3.2.6"
+org-springframework-boot = "3.2.8"
 
 [libraries]
 org-springframework-spring-framework-bom = "org.springframework:spring-framework-bom:6.1.11"