Update Apache Lucene version for 2.19.4 (opensearch-project#19443)

Signed-off-by: Ankit Jain <jainankitk@apache.org>
(cherry picked from commit 63eeb0d)

Author: jainankitk

libs/core/src/main/java/org/opensearch/Version.java

@@ -117,6 +117,7 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_2_19_1 = new Version(2190199, org.apache.lucene.util.Version.LUCENE_9_12_1);
     public static final Version V_2_19_2 = new Version(2190299, org.apache.lucene.util.Version.LUCENE_9_12_1);
     public static final Version V_2_19_3 = new Version(2190399, org.apache.lucene.util.Version.LUCENE_9_12_2);
+    public static final Version V_2_19_4 = new Version(2190499, org.apache.lucene.util.Version.LUCENE_9_12_3);
     public static final Version V_3_0_0 = new Version(3000099, org.apache.lucene.util.Version.LUCENE_10_1_0);
     public static final Version V_3_1_0 = new Version(3010099, org.apache.lucene.util.Version.LUCENE_10_2_1);
     public static final Version V_3_2_0 = new Version(3020099, org.apache.lucene.util.Version.LUCENE_10_2_2);