Bump org.springframework.boot in the all-dependencies group

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


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
  dependency-version: 3.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: all-dependencies
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -13,7 +13,7 @@ repositories {
 
 plugins {
     val kotlinVersion = "2.2.20"
-    id("org.springframework.boot") version "3.5.5"
+    id("org.springframework.boot") version "3.5.6"
     kotlin("jvm") version kotlinVersion
     kotlin("plugin.spring") version kotlinVersion
     kotlin("plugin.jpa") version kotlinVersion