Upgrade opensearch-java client to latest 2.20.0 version.

Signed-off-by: Rishikesh1159 <[email protected]>

Author: Rishikesh1159

settings.gradle

@@ -41,7 +41,7 @@ dependencyResolutionManagement {
             library('protobuf-util', 'com.google.protobuf', 'protobuf-java-util').versionRef('protobuf')
             version('opentelemetry', '0.16.0-alpha')
             library('opentelemetry-proto', 'io.opentelemetry.proto', 'opentelemetry-proto').versionRef('opentelemetry')
-            version('opensearchJava', '2.8.1')
+            version('opensearchJava', '2.20.0')
             library('opensearch-java', 'org.opensearch.client', 'opensearch-java').versionRef('opensearchJava')
             version('opensearch', '1.3.14')
             library('opensearch-client', 'org.opensearch.client', 'opensearch-rest-client').versionRef('opensearch')