By Dominique Vidalon PARIS, Oct 26 (Reuters) - Europe's largest food retailer Carrefour CARR.PA on Wednesday raised its cash flow target for this year as sales growth accelerated in the third quarter, especially in the firm's core French market. Carrefour's closely watched hypermarkets benefitted from their "attractive" low-price offers as buyers grappled with inflation, the company said. Carrefour said it now expected free cash flow to come in "comfortably above" 1 billion euros ($1.01 billion) at the end of 2022, up from a previous forecast of "at least" one billion euros.