Update a registered RCS card in place (Flow Builder V2 "Update card")
Creates a NEW Twilio Content Template (Content Templates are immutable — every create mints a fresh content_sid) but UPDATEs the existing rcs_content_templates ROW in place rather than inserting a new one, so a flow node's stored templateId stays stable across edits even though the underlying content_sid churns. Same validation/limits as templates/create. Authenticated workspace user (Bearer).
PUT
https://api.channelautomation.com/api/rcs/workspaces/{workspaceId}/templates/{templateId}Authorization
Path parameters
Request body JSON required
Returns
200
Card updated (same id, new contentSid) — or {ok:false, error} on validation/Twilio failure.
