docs: Update DEVELOPMENT_MAINTENANCE.md with an extra note for testing
General MR
Summary
Updates DEVELOPMENT_MAINTENANCE.md with an extra note for testing keycloak login.
UNCLASSIFIED - NO CUI
Iron Bank will be replacing the old container signing certificate with the new container signing certificate. No additional action is required. Users can find additional information regarding the certificate rotation and container signature verification here and here.
Currently supported Big Bang Version is 2.35
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