Bump org.springframework.boot from 3.3.5 to 3.4.3

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.3.5 to 3.4.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.5...v3.4.3)

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

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

Author: dependabot[bot]

build.gradle.kts

@@ -1,7 +1,7 @@
 import io.gitlab.arturbosch.detekt.getSupportedKotlinVersion
 
 plugins {
-    id("org.springframework.boot") version "3.3.5"
+    id("org.springframework.boot") version "3.4.3"
     id("io.spring.dependency-management") version "1.1.7"
     id("org.jmailen.kotlinter") version "4.3.0"
     id("io.gitlab.arturbosch.detekt") version "1.23.8"