update gradle intellij version

Author: davidmyang

build.gradle.kts

@@ -6,7 +6,7 @@ plugins {
     // Java support
     id("java")
     // Gradle IntelliJ Plugin
-    id("org.jetbrains.intellij") version "1.8.0"
+    id("org.jetbrains.intellij") version "1.15.0"
     // Gradle Changelog Plugin
     id("org.jetbrains.changelog") version "1.3.1"
     // Gradle Qodana Plugin