JDK Requirements should clarify that java 8 requires a jre, not a jdk

https://github.com/redhat-developer/vscode-java/wiki/JDK-Requirements documents how to set the project JDK. The example config contains "path": "/path/to/jdk-8". However, when I followed the instructions and entered a path to a JDK, I got an error that the jdk did not fulfill the requirements of "JavaSE-1.8". When I instead downloaded a jdk8 jre and pointed to it, everything worked. So I think the documentation should more clearly state that you need a JRE, not a JDK, for java 8.

Environment

• Operating System: Ubuntu Linux
• JDK version: 8
• Visual Studio Code version: 1.75.1
• Java extension version: Language Support for Java(TM) by Red Hat v1.15.0
• Java Debugger extension version: Debugger for Java v0.48.0

Steps To Reproduce

1. Follow instructions in https://github.com/redhat-developer/vscode-java/wiki/JDK-Requirements to configure a java 8 jdk as the default
2. Observe error "Runtime at '/path/to/jdk1.8.0_xxx' is not compatible with the 'JavaSE-1.8' environment"

Open the linked JDK-Requirements wiki page and review the example configuration for Java 8. Clarify the required runtime type so it matches the working setup described in the issue, then verify that the instructions no longer direct users toward an incompatible path.