Gradle: Bump org.springframework.boot from 3.4.4 to 3.5.5

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.4.4 to 3.5.5.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.4.4...v3.5.5)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 3.5.5
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
   val kotlinVersion = "2.0.21"
   kotlin("jvm") version kotlinVersion
   id("com.diffplug.spotless") version "7.0.3"
-  id("org.springframework.boot") version "3.4.4" apply false
+  id("org.springframework.boot") version "3.5.5" apply false
   id("io.gitlab.arturbosch.detekt") version "1.23.8"
   id("pl.allegro.tech.build.axion-release") version "1.18.18"
   id("org.jetbrains.kotlinx.kover") version "0.9.1"