Bump org.springframework.boot from 4.0.1 to 4.0.3

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 4.0.1 to 4.0.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v4.0.1...v4.0.3)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 4.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -14,7 +14,7 @@ ext {
     gsonVersion = "2.13.2"
     picocliVersion = "4.7.7"
     // 3.0(?) introduced Spring AOT automatic stuff and breaks when using GraalVM native image
-    springBoot = "4.0.1"
+    springBoot = "4.0.3"
     acdasmVersion = "6.1"
     graalvmBuildVersion = "0.11.4"
     clthVersion = "2.1"