Merge pull request #1833 from aws-samples/dependabot/gradle/dynamodb-api/java/awsSdk2Version-2.16.20

Bump awsSdk2Version from 2.16.19 to 2.16.20 in /dynamodb-api/java

Author: timmattison

dynamodb-api/java/build.gradle

@@ -34,7 +34,7 @@ application {
 // Specify all of our dependency versions
 def slf4jVersion = '1.7.30'
 def gsonVersion = '2.8.6'
-def awsSdk2Version = '2.16.19'
+def awsSdk2Version = '2.16.20'
 def junitVersion = '4.13.2'
 def awsLambdaJavaCoreVersion = '1.2.1'
 def vavrVersion = '0.10.3'