chore(deps): update plugin org.springframework.boot to v3.4.0

Author: renovate[bot]

build.gradle

@@ -3,7 +3,7 @@ import com.bmuschko.gradle.docker.tasks.container.*
 
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.2.5'
+	id 'org.springframework.boot' version '3.4.0'
 	id 'io.spring.dependency-management' version '1.1.5'
 	id 'com.diffplug.spotless' version '6.25.0'
 	id 'com.bmuschko.docker-spring-boot-application' version '9.4.0'