Upgrade to build scan plugin 2.4 (#45426)

build.gradle

@@ -32,7 +32,7 @@ import org.gradle.plugins.ide.eclipse.model.SourceFolder
 import static org.elasticsearch.gradle.tool.Boilerplate.maybeConfigure
 
 plugins {
-    id 'com.gradle.build-scan' version '2.3'
+    id 'com.gradle.build-scan' version '2.4'
     id 'base'
     id 'elasticsearch.global-build-info'
 }