fix: support windows binary for maven

Signed-off-by: Ruben Romero Montes <rromerom@redhat.com>

Author: ruromero

src/main/java/com/redhat/exhort/providers/JavaMavenProvider.java

@@ -54,7 +54,7 @@ public final class JavaMavenProvider extends BaseJavaProvider {
   private static final String PROP_JAVA_HOME = "JAVA_HOME";
   private static final Logger log = LoggersFactory.getLogger(JavaMavenProvider.class.getName());
   private final String mvnExecutable;
-  private static final String MVN = "mvn";
+  private static final String MVN = isWindows() ? "mvn.cmd" : "mvn";
   private static final String ARG_VERSION = "-v";
 
   public JavaMavenProvider(Path manifest) {