Bump org.springframework.boot in /services/hanke-service

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.5.11 to 4.0.4.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.11...v4.0.4)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 4.0.4
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

services/hanke-service/build.gradle.kts

@@ -57,7 +57,7 @@ spotless {
 
 plugins {
     val kotlinVersion = "2.2.20"
-    id("org.springframework.boot") version "3.5.11"
+    id("org.springframework.boot") version "4.0.4"
     id("io.spring.dependency-management") version "1.1.7"
     id("com.diffplug.spotless") version "7.2.1"
     kotlin("jvm") version kotlinVersion