chore(lapis): bump org.springframework.boot in /lapis

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.5.6 to 4.0.2.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.6...v4.0.2)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 4.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

lapis/build.gradle

@@ -2,7 +2,7 @@ import org.gradle.api.tasks.testing.logging.TestExceptionFormat
 import org.gradle.api.tasks.testing.logging.TestLogEvent
 
 plugins {
-    id 'org.springframework.boot' version '3.5.6'
+    id 'org.springframework.boot' version '4.0.2'
     id 'io.spring.dependency-management' version '1.1.7'
     id 'org.jetbrains.kotlin.jvm' version '2.3.10'
     id 'org.jetbrains.kotlin.plugin.spring' version '2.3.10'