Bump org.springframework.boot from 3.1.5 to 3.1.6

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.1.5 to 3.1.6.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.5...v3.1.6)

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

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -112,5 +112,5 @@ io-spring-antora-generate-antora-yml = "io.spring.antora.generate-antora-yml:0.0
 nl-littlerobots-version-catalog-update = "nl.littlerobots.version-catalog-update:0.8.1"
 org-antora = "org.antora:1.0.0"
 org-gretty = "org.gretty:4.1.1"
-org-springframework-boot = "org.springframework.boot:3.1.5"
-org-springframework-boot-aot = "org.springframework.boot.aot:3.1.5"
+org-springframework-boot = "org.springframework.boot:3.1.6"
+org-springframework-boot-aot = "org.springframework.boot.aot:3.1.6"