build(deps): bump org.springframework.boot from 2.7.5 to 3.1.5

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 2.7.5 to 3.1.5.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.5...v3.1.5)

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

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

build.gradle.kts

@@ -30,7 +30,7 @@ plugins {
  kotlin("plugin.allopen") version kotlinVersion
  id("org.jmailen.kotlinter") version "3.10.0"
  id("com.github.ben-manes.versions") version "0.49.0"
- id("org.springframework.boot") version "2.7.5"
+ id("org.springframework.boot") version "3.1.5"
  id("org.jetbrains.kotlin.jvm") version kotlinVersion
  id("org.jetbrains.kotlin.plugin.spring") version kotlinVersion
  id("io.spring.dependency-management") version "1.1.3"