Bump org.springframework.boot from 4.0.2 to 4.0.3

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 4.0.2 to 4.0.3.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v4.0.2...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>

Author: dependabot[bot]

build.gradle

@@ -1,7 +1,7 @@
 plugins {
     id "java"
     id "application"
-    id "org.springframework.boot" version "4.0.2"
+    id "org.springframework.boot" version "4.0.3"
     id "io.freefair.git-version"
     id "io.freefair.lombok"
     id "io.freefair.okhttp"