fix(Google Sheets Node): Add column names row if sheet is empty (#10200)

Co-authored-by: Shireen Missi <94372015+ShireenMissi@users.noreply.github.com>

packages/nodes-base/nodes/Google/Sheet/v2/actions/sheet/append.operation.ts

@@ -275,7 +275,10 @@ export async function execute(
 		//if no trailing empty row exists in the sheet update operation will fail
 		await sheet.appendEmptyRowsOrColumns(sheetId, 1, 0);
 
-		const lastRow = (sheetData ?? []).length + 1;
+		// if sheetData is undefined it means that the sheet was empty
+		// we did add row with column names in the first row (autoMapInputData)
+		// to account for that length has to be 1 and we append data in the next row
+		const lastRow = (sheetData ?? [{}]).length + 1;
 
 		await sheet.appendSheetData({
 			inputData,