Bump org.springframework.boot from 3.5.8 to 4.0.2

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.5.8 to 4.0.2.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.8...v4.0.2)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 4.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
     kotlin("plugin.serialization") version kotlinVersion
     kotlin("plugin.spring") version kotlinVersion
 
-    id("org.springframework.boot") version "3.5.8"
+    id("org.springframework.boot") version "4.0.2"
     id("org.graalvm.buildtools.native") version "0.11.4"
     id("org.jlleitschuh.gradle.ktlint") version "14.0.1"
 }