build(deps): bump org.springframework.boot from 3.1.1 to 3.1.4

Bumps [org.springframework.boot](https://github.com/spring-projects/spring-boot) from 3.1.1 to 3.1.4.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.1...v3.1.4)

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

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

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ indra = "3.1.1"
 indra = { id = "net.kyori.indra", version.ref = "indra" }
 indra-checkstyle = { id = "net.kyori.indra.checkstyle", version.ref = "indra" }
 spotless = { id = "com.diffplug.spotless", version = "6.19.0" }
-spring-boot = { id = "org.springframework.boot", version = "3.1.1" }
+spring-boot = { id = "org.springframework.boot", version = "3.1.4" }
 spring-dependency-management = { id = "io.spring.dependency-management", version = "1.1.1" }
 
 [libraries]