Bump org.springframework.boot:spring-boot-starter-data-mongodb (#1320)

Bumps [org.springframework.boot:spring-boot-starter-data-mongodb](https://github.com/spring-projects/spring-boot) from 2.7.14 to 2.7.15.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.14...v2.7.15)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

plugins/gradle/example-server/build.gradle

@@ -13,7 +13,7 @@ mainClassName = "io.github.kobylynskyi.product.Application"
 
 dependencies {
     implementation "org.springframework.boot:spring-boot-starter-web:2.7.15"
-    implementation "org.springframework.boot:spring-boot-starter-data-mongodb:2.7.14"
+    implementation "org.springframework.boot:spring-boot-starter-data-mongodb:2.7.15"
 
     implementation "com.graphql-java-kickstart:graphql-spring-boot-starter:11.0.0"
     implementation "com.graphql-java-kickstart:graphiql-spring-boot-starter:11.1.0"