Bump aws-serverless-java-container-core from 1.3.1 to 1.6

Bumps [aws-serverless-java-container-core](https://github.com/awslabs/aws-serverless-java-container) from 1.3.1 to 1.6.
- [Release notes](https://github.com/awslabs/aws-serverless-java-container/releases)
- [Commits](aws/serverless-java-container@aws-serverless-java-container-1.3.1...aws-serverless-java-container-1.6)

---
updated-dependencies:
- dependency-name: com.amazonaws.serverless:aws-serverless-java-container-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

bom/application/pom.xml

@@ -143,7 +143,7 @@
         <ooxml-schemas.version>1.4</ooxml-schemas.version>
         <aws-lambda-java.version>1.2.1</aws-lambda-java.version>
         <aws-lambda-java-events.version>3.9.0</aws-lambda-java-events.version>
-        <aws-lambda-serverless-java-container.version>1.3.1</aws-lambda-serverless-java-container.version>
+        <aws-lambda-serverless-java-container.version>1.6</aws-lambda-serverless-java-container.version>
         <aws-xray.version>2.9.1</aws-xray.version>
         <awssdk.version>2.17.4</awssdk.version>
         <aws-alexa-sdk.version>2.40.0</aws-alexa-sdk.version>