[deps]: Bump org.springframework.boot from 3.3.6 to 3.4.3

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.3.6 to 3.4.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.3.6...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] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -4,7 +4,7 @@ plugins {
     id "idea"
     id "org.jetbrains.kotlin.jvm" version "1.9.25"
     id "org.jetbrains.kotlin.plugin.spring" version "1.9.25"
-    id "org.springframework.boot" version "3.3.6"
+    id "org.springframework.boot" version "3.4.3"
     id "io.spring.dependency-management" version "1.1.6"
     id "com.github.davidmc24.gradle.plugin.avro-base" version "1.9.1"
     id "com.google.protobuf" version "0.9.4"