Task: Send new subreddit posts to Discord

n8n workflow:
{"nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[-130,510],"parameters":{},"typeVersion":1},{"name":"Filter RSS Data","type":"n8n-nodes-base.set","position":[280,340],"parameters":{"values":{"string":[{"name":"Title","value":"={{$json[\"title\"]}}"},{"name":"Date","value":"={{$json[\"pubDate\"]}}"},{"name":"URL","value":"={{$json[\"link\"]}}"},{"name":"Author","value":"={{$json[\"author\"]}}"}]},"options":{},"keepOnlySet":true},"typeVersion":1},{"name":"Cron1","type":"n8n-nodes-base.cron","position":[-127.5,340],"parameters":{"triggerTimes":{"item":[{"mode":"everyX","unit":"minutes","value":1}]}},"typeVersion":1},{"name":"Reddit RSS Feed","type":"n8n-nodes-base.rssFeedRead","position":[70,340],"parameters":{"url":"=https://www.reddit.com/r/selfhosted/new/.rss"},"executeOnce":true,"typeVersion":1},{"name":"New RSS","type":"n8n-nodes-base.function","position":[470,340],"parameters":{"functionCode":"const staticData = getWorkflowStaticData('global');\nconst newRSSIds = items.map(item => item.json[\"Date\"]);\nconst oldRSSIds = staticData.oldRSSIds; \n\nif (!oldRSSIds) {\n  staticData.oldRSSIds = newRSSIds;\n  return [items[0]];\n}\n\nconst actualNewRSSIds = newRSSIds.filter((id) => !oldRSSIds.includes(id));\nconst actualNewRSS = items.filter((data) => actualNewRSSIds.includes(data.json['Date']));\nstaticData.oldRSSIds = [...actualNewRSSIds, ...oldRSSIds];\n\nreturn actualNewRSS;\n"},"typeVersion":1},{"name":"Discord","type":"n8n-nodes-base.discord","position":[660,340],"parameters":{"text":"=[{{$json[\"Title\"]}}]({{$json[\"URL\"]}}) by {{$json[\"Author\"]}}","webhookUri":"WEBHOOK_URI_HERE"},"typeVersion":1}],"connections":{"Cron1":{"main":[[{"node":"Reddit RSS Feed","type":"main","index":0}]]},"New RSS":{"main":[[{"node":"Discord","type":"main","index":0}]]},"Filter RSS Data":{"main":[[{"node":"New RSS","type":"main","index":0}]]},"Reddit RSS Feed":{"main":[[{"node":"Filter RSS Data","type":"main","index":0}]]},"On clicking 'execute'":{"main":[[{"node":"Reddit RSS Feed","type":"main","index":0}]]}}}