Fix version identifier for 2.12.1

Signed-off-by: Kunal Kotwani <kkotwani@amazon.com>

Author: kotwanikunal

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

@@ -124,7 +124,7 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_2_11_1 = new Version(2110199, org.apache.lucene.util.Version.LUCENE_9_7_0);
     public static final Version V_2_11_2 = new Version(2110299, org.apache.lucene.util.Version.LUCENE_9_7_0);
     public static final Version V_2_12_0 = new Version(2120099, org.apache.lucene.util.Version.LUCENE_9_9_2);
-    public static final Version V_2_12_1 = new Version(20120199, org.apache.lucene.util.Version.LUCENE_9_9_2);
+    public static final Version V_2_12_1 = new Version(2120199, org.apache.lucene.util.Version.LUCENE_9_9_2);
     public static final Version V_2_13_0 = new Version(2130099, org.apache.lucene.util.Version.LUCENE_9_10_0);
     public static final Version CURRENT = V_2_13_0;