fix(deps): update dependency org.jetbrains.kotlinx:kotlinx-coroutines-test to v1.9.0 (#137)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle.kts

@@ -29,7 +29,7 @@ dependencies {
 
     testImplementation("com.expediagroup:graphql-kotlin-spring-client:8.0.0")
     testImplementation("org.jetbrains.kotlin:kotlin-test")
-    testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.8.1")
+    testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.9.0")
     testImplementation("org.springframework.boot:spring-boot-starter-test:3.3.3")
 
     graphqlSDL("com.expediagroup:graphql-kotlin-federated-hooks-provider:8.0.0")