#28218: Update the Lucene version for 6.2.0 after backport

Author: jimczi

server/src/main/java/org/elasticsearch/Version.java

@@ -143,7 +143,7 @@ public class Version implements Comparable<Version> {
     public static final int V_6_1_2_ID = 6010299;
     public static final Version V_6_1_2 = new Version(V_6_1_2_ID, org.apache.lucene.util.Version.LUCENE_7_1_0);
     public static final int V_6_2_0_ID = 6020099;
-    public static final Version V_6_2_0 = new Version(V_6_2_0_ID, org.apache.lucene.util.Version.LUCENE_7_2_0);
+    public static final Version V_6_2_0 = new Version(V_6_2_0_ID, org.apache.lucene.util.Version.LUCENE_7_2_1);
     public static final int V_7_0_0_alpha1_ID = 7000001;
     public static final Version V_7_0_0_alpha1 =
         new Version(V_7_0_0_alpha1_ID, org.apache.lucene.util.Version.LUCENE_7_2_1);