Bump io.spring.dependency-management from 1.1.5 to 1.1.6

Bumps [io.spring.dependency-management](https://github.com/spring-gradle-plugins/dependency-management-plugin) from 1.1.5 to 1.1.6.
- [Release notes](https://github.com/spring-gradle-plugins/dependency-management-plugin/releases)
- [Commits](spring-gradle-plugins/dependency-management-plugin@v1.1.5...v1.1.6)

---
updated-dependencies:
- dependency-name: io.spring.dependency-management
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -8,5 +8,5 @@ org-springframework-data-spring-data-bom = "org.springframework.data:spring-data
 org-springframework-security-spring-security-oauth2-authorization-server = "org.springframework.security:spring-security-oauth2-authorization-server:1.0.4"
 
 [plugins]
-io-spring-dependency-management = { id = "io.spring.dependency-management", version = "1.1.5" }
+io-spring-dependency-management = { id = "io.spring.dependency-management", version = "1.1.6" }
 org-springframework-boot = { id = "org.springframework.boot", version.ref = "org-springframework-boot" }