Bump spring-boot-v3 from 3.5.5 to 3.5.6

Bumps `spring-boot-v3` from 3.5.5 to 3.5.6.

Updates `org.springframework.boot:spring-boot-dependencies` from 3.5.5 to 3.5.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.5...v3.5.6)

Updates `org.springframework.boot` from 3.5.5 to 3.5.6
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.5...v3.5.6)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-dependencies
  dependency-version: 3.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework.boot
  dependency-version: 3.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,5 +1,5 @@
 [versions]
-spring-boot-v3 = "3.5.5"
+spring-boot-v3 = "3.5.6"
 
 [libraries]
 spring-boot-v3-dependencies = { group = "org.springframework.boot", name = "spring-boot-dependencies", version.ref = "spring-boot-v3" }