add 'Connection':'close' to the request

[ahmed-mahmood-hanafy]

Hi Woocommerce team,

I use your api for updating prices and stock on a website , but when multiple requests are made in row there is a spike in ram on the server and the server crashes if there is other high loads on the site at the same time. this is a try to solve this problem , by closing the connection after the request is done

Thanks, ahmed hanafi