Updated byte codes for the heartbeat, fixed repl_ballot svg

Author: xuniq

doc/dev_guide/internals/iproto/images/repl_ballot.puml

@@ -15,7 +15,7 @@ json "**IPROTO_BALLOT body**" as ballot {
     "[[https://tarantool.io/en/doc/latest/dev_guide/internals/iproto/keys/#general-replication IPROTO_BALLOT_IS_ANON]]": "MP_BOOL",
     "[[https://tarantool.io/en/doc/latest/dev_guide/internals/iproto/keys/#general-replication IPROTO_BALLOT_IS_BOOTED]]": "MP_BOOL",
     "[[https://tarantool.io/en/doc/latest/dev_guide/internals/iproto/keys/#general-replication IPROTO_BALLOT_CAN_LEAD]]": "MP_BOOL",
-    "[[https://tarantool.io/en/doc/latest/dev_guide/internals/iproto/keys/#general-replication IPROTO_BALLOT_BOOTSTRAP_LEADER_UUID]]": "MP_UUID",
+    "[[https://tarantool.io/en/doc/latest/dev_guide/internals/iproto/keys/#general-replication IPROTO_BALLOT_BOOTSTRAP_LEADER_UUID]]": "MP_STR",
     "[[https://tarantool.io/en/doc/latest/dev_guide/internals/iproto/keys/#general-replication IPROTO_BALLOT_REGISTERED_REPLICA_UUIDS]]": "MP_ARRAY"
 }
 

doc/dev_guide/internals/iproto/images/repl_ballot.svg

@@ -192,7 +192,7 @@ General replication
 
         *   -   IPROTO_REPLICASET_UUID
             -   0x25 |br| MP_STR
-            -   Replicaset UUID.
+            -   UUID of the replica set.
                 Prior to Tarantool version 2.11, IPROTO_REPLICASET_UUID was called IPROTO_CLUSTER_UUID.
 
         *   -   IPROTO_LSN