Bump org.springframework.boot from 3.1.4 to 3.1.5 (#3039)

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.1.4 to 3.1.5.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.4...v3.1.5)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -8,7 +8,7 @@ buildscript {
 }
 
 plugins {
-  id 'org.springframework.boot' version '3.1.4'
+  id 'org.springframework.boot' version '3.1.5'
   id "com.install4j.gradle" version "10.0.6"
   id "de.undercouch.download" version "5.5.0"
   id 'jacoco'