[18.0][IMP] purchase_last_price_info: improve field name for last purchase currency rate#2964

JordiMForgeFlow wants to merge 2 commits intoOCA:18.0OCA/purchase-workflow:18.0from

ForgeFlow:18.0-imp-purchase_last_price_info-currency_rate_labelForgeFlow/purchase-workflow:18.0-imp-purchase_last_price_info-currency_rate_labelCopy head branch name to clipboard