Fix the until-build property of the IntelliJ plugin.

Setting it to "" creates a broken plugin, but omitting it sets it to the same as since-build. So apparently you have to do this. PiperOrigin-RevId: 665927556

Author: plumpy

idea_plugin/build.gradle.kts

@@ -42,6 +42,7 @@ intellijPlatform {
  version = "${googleJavaFormatVersion}.0"
  ideaVersion {
  sinceBuild = "223"
+ untilBuild = provider { null }
  }
  }