Update Documentation for AWS_XRAY_CONTEXT_MISSING allowed values like IGNORE_ERROR

Hi We are using latest X-Ray core SDK `com.amazonaws:aws-xray-recorder-sdk-core:2.9.1`
I am trying to suppress the log `Suppressing AWS X-Ray context missing exception`.
I was able to find `IGNORE_ERROR` is also an allowed value for ENV variable `AWS_XRAY_CONTEXT_MISSING` in code base at https://github.com/aws/aws-xray-sdk-java/blob/c14447e907617cd0330dbd3b7c747bc1d6c1614a/aws-xray-recorder-sdk-core/src/main/java/com/amazonaws/xray/strategy/ContextMissingStrategy.java#L21

However, Java configuration documentation does not mention this acceptable value: https://docs.aws.amazon.com/xray/latest/devguide/xray-sdk-java-configuration.html

Is this intentional? If not, can we please update the documentation to include this?