Update error message when enable javac without setting jdk23

[yuyully]

Environment

• Operating System: Linux
• JDK version: 23
• Visual Studio Code version: 1.95.3
• Java extension version: 1.37.0

Steps To Reproduce

1. Enable javac in settings: "java.jdt.ls.javac.enabled": "on"
2. Open a java project

Current Result

Then you will get the error as below. It doesn't work if only set java.configuration.runtimes following the message in this error. Extension can work with java.jdt.ls.java.home which doesn't indicate in the error message.

Expected Result

Update the error message to prompt users to set java.jdt.ls.java.home.