Fix a case-sensitive issue with ProcessUtil.pathOfCommand(Path path) on Windows

Author: Eng-Fouad

process/src/main/java/io/smallrye/common/process/ProcessUtil.java

@@ -223,6 +223,7 @@ private static final class Windows {
         private static final List<String> pathExt = Stream
                 .of(getenv("PATHEXT").split(File.pathSeparator))
                 .filter(s -> !s.isEmpty())
+                .map(String::toLowerCase)
                 .toList();
     }