Add version constant for 7.16.3

.ci/bwcVersions

@@ -47,6 +47,7 @@ BWC_VERSION:
   - "7.16.0"
   - "7.16.1"
   - "7.16.2"
+  - "7.16.3"
   - "7.17.0"
   - "8.0.0"
   - "8.1.0"

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

@@ -94,6 +94,7 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_7_16_0 = new Version(7160099, org.apache.lucene.util.Version.LUCENE_8_10_1);
     public static final Version V_7_16_1 = new Version(7160199, org.apache.lucene.util.Version.LUCENE_8_10_1);
     public static final Version V_7_16_2 = new Version(7160299, org.apache.lucene.util.Version.LUCENE_8_10_1);
+    public static final Version V_7_16_3 = new Version(7160399, org.apache.lucene.util.Version.LUCENE_8_10_1);
     public static final Version V_7_17_0 = new Version(7170099, org.apache.lucene.util.Version.LUCENE_8_10_1);
     public static final Version V_8_0_0 = new Version(8000099, org.apache.lucene.util.Version.LUCENE_9_0_0);
     public static final Version V_8_1_0 = new Version(8010099, org.apache.lucene.util.Version.LUCENE_9_0_0);