Task: Receive a Mattermost message when new record gets added to Notion

n8n workflow JSON:
{"nodes":[{"name":"Notion Trigger","type":"n8n-nodes-base.notionTrigger","position":[270,350],"parameters":{"event":"pageAddedToDatabase","pollTimes":{"item":[{"mode":"everyHour"}]},"databaseId":"6ea34c0d-67e8-4614-ad5c-68c665a34763"},"credentials":{"notionApi":""},"typeVersion":1},{"name":"IF","type":"n8n-nodes-base.if","position":[470,350],"parameters":{"conditions":{"string":[{"value1":"={{$json[\"Team\"]}}","value2":"Marketing"}]}},"typeVersion":1},{"name":"Mattermost","type":"n8n-nodes-base.mattermost","position":[670,250],"parameters":{"message":"=New meeting notes were added.\nAgenda: {{$json[\"Agenda\"]}}\nDate: {{$json[\"Date\"][\"start\"]}}\nLink: https://notion.so/{{$json[\"id\"].replace(/-/g,'')}}","channelId":"64cae1bh6pggtcupfd4ztwby4r","attachments":[],"otherOptions":{}},"credentials":{"mattermostApi":""},"typeVersion":1},{"name":"NoOp","type":"n8n-nodes-base.noOp","position":[668,495],"parameters":{},"typeVersion":1}],"connections":{"IF":{"main":[[{"node":"Mattermost","type":"main","index":0}],[{"node":"NoOp","type":"main","index":0}]]},"Notion Trigger":{"main":[[{"node":"IF","type":"main","index":0}]]}}}