Changes to List pipeline secrets

the pipelineSecrets/items/name response's property pattern was changed from ^[a-zA-Z_](?:[0-9A-Za-z]+|(_)(?!\1)){1,49}$ to ^[a-zA-Z_](?:[0-9A-Za-z]+(?:_[0-9A-Za-z]+){0,24}|[0-9A-Za-z]+(?:_[0-9A-Za-z]+){0,23}_|_[0-9A-Za-z]+(?:_[0-9A-Za-z]+){0,23}_?|_)$ for the status 200

the response property pipelineSecrets/items/lastUsed became nullable for the status 200