Bump org-springframework-boot from 3.1.8 to 3.1.9

Bumps `org-springframework-boot` from 3.1.8 to 3.1.9.

Updates `org.springframework.boot:spring-boot-dependencies` from 3.1.8 to 3.1.9
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.8...v3.1.9)

Updates `org.springframework.boot:spring-boot-gradle-plugin` from 3.1.8 to 3.1.9
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v3.1.8...v3.1.9)

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

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -7,7 +7,7 @@ org-gretty = "4.1.2"
 org-mongodb = "4.8.2"
 org-slf4j = "2.0.12"
 org-testcontainers = "1.17.6"
-org-springframework-boot = "3.1.8"
+org-springframework-boot = "3.1.9"
 
 [libraries]
 ch-qos-logback-logback-classic = { module = "ch.qos.logback:logback-classic", version.ref = "ch-qos-logback" }