Bump org.springframework.boot:spring-boot-starter-data-mongodb

Bumps [org.springframework.boot:spring-boot-starter-data-mongodb](https://github.com/spring-projects/spring-boot) from 2.7.18 to 4.0.0.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.7.18...v4.0.0)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-data-mongodb
  dependency-version: 4.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

plugins/gradle/example-client/build.gradle

@@ -14,7 +14,7 @@ mainClassName = "io.github.kobylynskyi.order.Application"
 
 dependencies {
     implementation "org.springframework.boot:spring-boot-starter-web:2.7.10"
-    implementation "org.springframework.boot:spring-boot-starter-data-mongodb:2.7.18"
+    implementation "org.springframework.boot:spring-boot-starter-data-mongodb:4.0.0"
 
     implementation "com.graphql-java-kickstart:graphql-spring-boot-starter:11.1.0"
     implementation "com.graphql-java-kickstart:graphiql-spring-boot-starter:11.1.0"