Fix: Allow JDK folders starting with "jdk" or "jdk-" during export

The export logic in JavaBuild.java previously looked only for JDK folders starting with "jdk-".
However, the embedded JDK may simply be named "jdk", causing path resolution to fail and no JRE to be bundled.
This leads to macOS launch issues like JRExLoadFullError and JRELoadError.
Updated the filter to also allow "jdk" prefixes.

Author: amankumar100

java/src/processing/mode/java/JavaBuild.java

@@ -751,7 +751,7 @@ protected boolean exportApplication(File destFolder,
           try {
             var jdk = Files.list(new File(resources).toPath())
                     .filter(Files::isDirectory)
-                    .filter(p -> p.getFileName().toString().startsWith("jdk-"))
+                    .filter(p -> p.getFileName().toString().matches("jdk[-\\d].*"))
                     .findFirst()
                     .orElseThrow();
             var target = new File(contentsFolder, "PlugIns/");