build(deps): bump org.springframework.boot in /api-app

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.4.6 to 3.5.0.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.4.6...v3.5.0)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 3.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

api-app/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
   checkstyle
   jacoco
   pmd
-  id("org.springframework.boot") version "3.4.6"
+  id("org.springframework.boot") version "3.5.0"
   id("io.spring.dependency-management") version "1.1.7"
   id("com.diffplug.spotless") version "7.0.3"
 }