ElasticContainer: Upgrade V7_6 to elasticsearch 7.6.1

Upgrade elasticsearch-rest-client to 7.6.1, accordingly.

Change-Id: I7567688469aa75bcda3514b2963d3a8f0b86976a

javatests/com/google/gerrit/elasticsearch/ElasticContainer.java

diff --git a/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java b/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
index 98d723f..96041a1 100644
--- a/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
+++ b/javatests/com/google/gerrit/elasticsearch/ElasticContainer.java
@@ -67,7 +67,7 @@
       case V7_5:
         return "blacktop/elasticsearch:7.5.2";
       case V7_6:
-        return "blacktop/elasticsearch:7.6.0";
+        return "blacktop/elasticsearch:7.6.1";
     }
     throw new IllegalStateException("No tests for version: " + version.name());
   }

tools/nongoogle.bzl

diff --git a/tools/nongoogle.bzl b/tools/nongoogle.bzl
index ba073c2..52de650 100644
--- a/tools/nongoogle.bzl
+++ b/tools/nongoogle.bzl
@@ -94,8 +94,8 @@
     # and httpasyncclient as necessary.
     maven_jar(
         name = "elasticsearch-rest-client",
-        artifact = "org.elasticsearch.client:elasticsearch-rest-client:7.6.0",
-        sha1 = "3d56c1fca22af1aab5a1b23698ae9ec6f71db1a2",
+        artifact = "org.elasticsearch.client:elasticsearch-rest-client:7.6.1",
+        sha1 = "6fb9f72e9d86a8c503f26f28fa7271f4ac065709",
     )
 
     maven_jar(