Bump aws.sdk.version from 1.11.503 to 1.11.504

Bumps `aws.sdk.version` from 1.11.503 to 1.11.504.

Updates `aws-java-sdk-dynamodb` from 1.11.503 to 1.11.504
- [Release notes](https://github.com/aws/aws-sdk-java/releases)
- [Changelog](https://github.com/aws/aws-sdk-java/blob/master/CHANGELOG.md)
- [Commits](aws/aws-sdk-java@1.11.503...1.11.504)

Updates `aws-java-sdk-core` from 1.11.503 to 1.11.504
- [Release notes](https://github.com/aws/aws-sdk-java/releases)
- [Changelog](https://github.com/aws/aws-sdk-java/blob/master/CHANGELOG.md)
- [Commits](aws/aws-sdk-java@1.11.503...1.11.504)

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

pom.xml

@@ -21,7 +21,7 @@
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
         <junit.version>5.4.0</junit.version>
-        <aws.sdk.version>1.11.503</aws.sdk.version>
+        <aws.sdk.version>1.11.504</aws.sdk.version>
         <hamcrest.version>2.1</hamcrest.version>
     </properties>