(Reuters) – French shopping mall owner Klepierre on Wednesday reported a 31% increase in net rental income for the first nine months of the year as retail trends normalise after two years of on-and-off restrictions to curb the spread of the coronavirus. The group said footfall for the three months to Sept. 30 increased by 12% compared to the same period last year, in part thanks to an increase in activity in malls in areas dependent on commuters or tourists which had experienced a slower resumption after restrictions were eased. Klepierre, which leases commercial space to retailers such as Zar…