Changes to GET /content-pages

the response property items/previewImageUrl became nullable for the status 200

the response property items/signupQueryParameters became nullable for the status 200

the response property items/subtitle became nullable for the status 200

the response property items/previewImageUrl became optional for the status 200

the response property items/signupQueryParameters became optional for the status 200

the response property items/subtitle became optional for the status 200

removed the required property items/blockDefinitions/items/header/type from the response with the 200 status

api tag Content Pages added

added the required property items/blockDefinitions/items/type to the response with the 200 status