Bump org.springframework.boot from 3.5.3 to 3.5.7

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.5.3 to 3.5.7.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.3...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] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -11,6 +11,6 @@ spring-framework-bom='org.springframework:spring-framework-bom:6.2.8'
 spring-security-bom='org.springframework.security:spring-security-bom:6.5.1'
 
 [plugins]
-spring-boot='org.springframework.boot:3.5.3'
+spring-boot='org.springframework.boot:3.5.7'
 dependency-management='io.spring.dependency-management:1.1.7'
 security-release='io.spring.security.release:1.0.10'