Bump graphql-java-tools from 12.1.0 to 13.0.0

Bumps [graphql-java-tools](https://github.com/graphql-java-kickstart/graphql-java-tools) from 12.1.0 to 13.0.0.
- [Release notes](https://github.com/graphql-java-kickstart/graphql-java-tools/releases)
- [Commits](https://github.com/graphql-java-kickstart/graphql-java-tools/commits)

---
updated-dependencies:
- dependency-name: com.graphql-java-kickstart:graphql-java-tools
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

backend/build.gradle.kts

@@ -32,7 +32,7 @@ dependencies {
     implementation("io.micronaut.data:micronaut-data-jdbc")
     implementation("io.micronaut.flyway:micronaut-flyway")
     implementation("io.micronaut.graphql:micronaut-graphql")
-    implementation("com.graphql-java-kickstart:graphql-java-tools:12.1.0")
+    implementation("com.graphql-java-kickstart:graphql-java-tools:13.0.0")
     implementation("com.graphql-java:graphql-java-extended-validation:18.1-hibernate-validator-6.2.0.Final")
     implementation("io.micronaut:micronaut-validation")
     runtimeOnly("org.postgresql:postgresql")