Use JDK 17 on buildSrc

Issue gh-11324

buildSrc/build.gradle

@@ -5,7 +5,7 @@ plugins {
 	id 'com.apollographql.apollo' version '2.4.5'
 }
 
-sourceCompatibility = JavaVersion.VERSION_11
+sourceCompatibility = JavaVersion.VERSION_17
 
 repositories {
 	gradlePluginPortal()