Evaluate the impact on existing guides, whether the affected content is upstream-downstream (and the corresponding 8/14 cut-off date) or downstream only, and any follow up steps.

Affected version: 3.9

SME: cescoffi@redhat.com 

Resources: 

• An overview of the changes is available in the migration guide: https://github.com/quarkusio/quarkus/wiki/Migration-Guide-3.9#keystore-and-trust-store-default-format-change