Update Campaign

curl --request PATCH \
  --url https://api.puretalk.ai/api/campaigns/{campaign_id} \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --data '{
  "name": "<string>",
  "start_date": "<string>",
  "end_date": "<string>",
  "ai_assistant_id": "<string>",
  "type": "<string>"
}'

{
  "err": true,
  "msg": "<string>"
}