Bump org.springframework.boot:spring-boot-dependencies

Bumps [org.springframework.boot:spring-boot-dependencies](https://github.com/spring-projects/spring-boot) from 3.5.6 to 4.0.2.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.6...v4.0.2)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-dependencies
  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]

lmos-runtime-bom/build.gradle.kts

@@ -13,7 +13,7 @@ javaPlatform {
 }
 
 dependencies {
-    val springBootVersion = "3.5.6"
+    val springBootVersion = "4.0.2"
     val ktorVersion = "3.4.0"
     val kotlinxVersion = "1.10.0"
     val lmosRouterVersion = "0.23.0"