Bump io.spring.gradle:dependency-management-plugin

Bumps [io.spring.gradle:dependency-management-plugin](https://github.com/spring-gradle-plugins/dependency-management-plugin) from 1.0.10.RELEASE to 1.0.15.RELEASE.
- [Release notes](https://github.com/spring-gradle-plugins/dependency-management-plugin/releases)
- [Commits](spring-gradle-plugins/dependency-management-plugin@v1.0.10.RELEASE...v1.0.15.RELEASE)

---
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]>

Author: dependabot[bot]

buildSrc/build.gradle

@@ -62,7 +62,7 @@ dependencies {
     implementation localGroovy()
 
     implementation 'io.github.gradle-nexus:publish-plugin:1.1.0'
-    implementation 'io.spring.gradle:dependency-management-plugin:1.0.10.RELEASE'
+    implementation 'io.spring.gradle:dependency-management-plugin:1.0.15.RELEASE'
     implementation 'io.projectreactor:reactor-core:3.4.33'
     implementation 'com.apollographql.apollo:apollo-runtime:2.4.5'
     implementation 'com.github.ben-manes:gradle-versions-plugin:0.38.0'