build(deps): bump org.springframework.boot in /modules/fbs-core/api

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 2.7.12 to 3.1.5.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.12...v3.1.5)

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

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

modules/fbs-core/api/build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "org.springframework.boot" version "2.7.12"
+    id "org.springframework.boot" version "3.1.5"
     id 'jacoco'
     id "com.github.alisiikh.scalastyle" version "3.5.0"
     id "org.jetbrains.kotlin.jvm" version "1.7.20"