deps(deps): bump org.springframework.boot:spring-boot-dependencies

Bumps the spring-ecosystem group with 1 update: [org.springframework.boot:spring-boot-dependencies](https://github.com/spring-projects/spring-boot).


Updates `org.springframework.boot:spring-boot-dependencies` from 3.5.3 to 3.5.4
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.5.3...v3.5.4)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-dependencies
  dependency-version: 3.5.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: spring-ecosystem
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -31,7 +31,7 @@ opentelemetry = "1.51.0"
 oshai-logging = "7.0.7"
 postgresql = "42.7.4"
 slf4j = "2.0.17"
-spring-boot = "3.5.3"
+spring-boot = "3.5.6"
 spring-management = "1.1.7"
 sqlite = "3.46.1.3"
 testcontainers = "1.19.7"