Bump elasticsearch-rest-client from 6.8.4 to 6.8.5 (#31)

Bumps [elasticsearch-rest-client](https://github.com/elastic/elasticsearch) from 6.8.4 to 6.8.5.
- [Release notes](https://github.com/elastic/elasticsearch/releases)
- [Commits](elastic/elasticsearch@v6.8.4...v6.8.5)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

build.gradle

@@ -36,7 +36,7 @@ allprojects {
     implementation 'org.freemarker:freemarker-gae:2.3.29'
     implementation 'org.reflections:reflections:0.9.11'
     implementation 'org.springframework.boot:spring-boot-starter-amqp'
-    implementation 'org.elasticsearch.client:elasticsearch-rest-client:6.8.4'
+    implementation 'org.elasticsearch.client:elasticsearch-rest-client:6.8.5'
     implementation 'org.elasticsearch.client:elasticsearch-rest-high-level-client:6.8.4'
     runtime 'mysql:mysql-connector-java:8.0.18'