Bump io.spring.gradle:dependency-management-plugin from 1.1.5 to 1.1.6

Bumps [io.spring.gradle:dependency-management-plugin](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.gradle:dependency-management-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -42,7 +42,7 @@ buildscript {
 
     dependencies {
         classpath "com.github.spotbugs.snom:spotbugs-gradle-plugin:5.2.5"
-        classpath "io.spring.gradle:dependency-management-plugin:1.1.5"
+        classpath "io.spring.gradle:dependency-management-plugin:1.1.6"
         classpath "com.diffplug.spotless:spotless-plugin-gradle:6.13.0"
 
         classpath "org.apache.httpcomponents:httpclient:4.5.14"