Version bump for 7.7.1 release (#57619)

Author: williamrandolph

.ci/bwcVersions

@@ -61,4 +61,5 @@ BWC_VERSION:
   - "7.6.2"
   - "7.7.0"
   - "7.7.1"
+  - "7.7.2"
   - "7.8.0"

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

@@ -138,6 +138,7 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_7_6_2 = new Version(7060299, org.apache.lucene.util.Version.LUCENE_8_4_0);
     public static final Version V_7_7_0 = new Version(7070099, org.apache.lucene.util.Version.LUCENE_8_5_1);
     public static final Version V_7_7_1 = new Version(7070199, org.apache.lucene.util.Version.LUCENE_8_5_1);
+    public static final Version V_7_7_2 = new Version(7070299, org.apache.lucene.util.Version.LUCENE_8_5_1);
     public static final Version V_7_8_0 = new Version(7080099, org.apache.lucene.util.Version.LUCENE_8_5_1);
     public static final Version V_7_9_0 = new Version(7090099, org.apache.lucene.util.Version.LUCENE_8_6_0);
     public static final Version CURRENT = V_7_9_0;