Task: COVID-19 newsletter version 2

n8n workflow JSON:
{"id":"9","name":"COVID","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[400,400],"parameters":{},"typeVersion":1},{"name":"Get Date","type":"n8n-nodes-base.functionItem","position":[600,400],"parameters":{"functionCode":"\nconst date = new Date(new Date().setDate(new Date().getDate() - 1)).toISOString().split(\"T\")[0].split(\"-\");\nitem.date = `${date[1]}-${date[2]}-${date[0]}`;\nreturn item;"},"typeVersion":1},{"name":"Fetch Script","type":"n8n-nodes-base.httpRequest","position":[800,400],"parameters":{"url":"=https://raw.githubusercontent.com/CSSEGISandData/COVID-19/master/csse_covid_19_data/csse_covid_19_daily_reports/{{$json[\"date\"]}}.csv","options":{},"responseFormat":"file","queryParametersUi":{"parameter":[]},"headerParametersUi":{"parameter":[]}},"typeVersion":1},{"name":"Convert 2 JSON","type":"n8n-nodes-base.spreadsheetFile","position":[1000,500],"parameters":{"options":{}},"typeVersion":1},{"name":"Filter region","type":"n8n-nodes-base.function","position":[1200,500],"parameters":{"functionCode":"items[0].json.myVariable = 1;\nreturn items.filter(item => item.json.Combined_Key == \"Berlin, Germany\");"},"typeVersion":1},{"name":"Send Email","type":"n8n-nodes-base.emailSend","position":[1400,500],"parameters":{"options":{}},"typeVersion":1}],"active":false,"settings":{"timezone":"Europe/London","executionTimeout":-1},"connections":{"Get Date":{"main":[[{"node":"Fetch Script","type":"main","index":0}]]},"Fetch Script":{"main":[[{"node":"Convert 2 JSON","type":"main","index":0}]]},"Filter region":{"main":[[{"node":"Send Email","type":"main","index":0}]]},"Convert 2 JSON":{"main":[[{"node":"Filter region","type":"main","index":0}]]},"On clicking 'execute'":{"main":[[{"node":"Get Date","type":"main","index":0}]]}}}