Bump org.springframework.boot from 3.5.5 to 3.5.7

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.5.5 to 3.5.7.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.5...v3.5.7)

---
updated-dependencies:
- dependency-name: org.springframework.boot
  dependency-version: 3.5.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

build.gradle

@@ -1,5 +1,5 @@
 plugins {
-    id "org.springframework.boot" version "3.5.5"
+    id "org.springframework.boot" version "3.5.7"
     id "io.spring.dependency-management" version "1.1.7"
     id "io.freefair.maven-publish-java" version "8.14"
     id "com.github.kt3k.coveralls" version "2.12.2"