Fix runQuickstartJavaFlinkLocal (#36946)

Author: Amar3tto

release/build.gradle.kts

@@ -39,7 +39,7 @@ task("runJavaExamplesValidationTask") {
   dependsOn(":runners:direct-java:runQuickstartJavaDirect")
   dependsOn(":runners:google-cloud-dataflow-java:runQuickstartJavaDataflow")
   dependsOn(":runners:spark:3:runQuickstartJavaSpark")
-  dependsOn(":runners:flink:1.19:runQuickstartJavaFlinkLocal")
+  dependsOn(":runners:flink:1.20:runQuickstartJavaFlinkLocal")
   dependsOn(":runners:direct-java:runMobileGamingJavaDirect")
   if (project.hasProperty("ver") || !project.version.toString().endsWith("SNAPSHOT")) {
     // only run one variant of MobileGaming on Dataflow for nightly