Bump org.springframework.boot from 2.7.18 to 4.0.0

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 2.7.18 to 4.0.0.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.18...v4.0.0)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

tools/asu/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id 'org.springframework.boot' version "2.7.18"
+    id 'org.springframework.boot' version "4.0.0"
     id 'java'
     id 'application'
     id 'org.graalvm.buildtools.native' version '0.10.6'