build(deps): bump org.springframework.boot from 3.3.5 to 3.5.6

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.3.5 to 3.5.6.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.5...v3.5.6)

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

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

Author: dependabot[bot]

build.gradle

@@ -5,7 +5,7 @@ buildscript {
 }
 
 plugins {
-    id 'org.springframework.boot' version '3.3.5'
+    id 'org.springframework.boot' version '3.5.6'
     id "com.gorylenko.gradle-git-properties" version "2.4.2"
     id "io.freefair.lombok" version "9.0.0"
     id 'org.jetbrains.kotlin.jvm' version '2.2.20'