SSL/TLS impact on postfix using default ca-bundle.crt

Recently you must have heard about AWS to Switch to SHA256 Hash Algorithm for SSL Certificates We are using postfix integration with Amazon SES, I am using default CA certificate as mentioned in the Integrating Amazon SES with Postfix documentation link I am using this ca certificate,Can you please verify that this cert uses SHA256 algorithm so that I would not be affected by this SSL/TLS certificate changes