Update dependency com.expediagroup:graphql-kotlin-spring-server to v8

Author: renovate[bot]

graphql-server/build.gradle.kts

@@ -17,7 +17,7 @@ kotlin {
   sourceSets {
     val jvmMain by getting {
       dependencies {
-        implementation("com.expediagroup:graphql-kotlin-spring-server:5.5.0")
+        implementation("com.expediagroup:graphql-kotlin-spring-server:8.4.0")
         implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.1")
         implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.3")