Updated Slack link in readme to point to ecommerce channel
Updated Slack link in readme to point to ecommerce channel
edx/ecommerce,edx/ecommerce,eduNEXT/edunext-ecommerce,edx/ecommerce,eduNEXT/edunext-ecommerce,eduNEXT/edunext-ecommerce,eduNEXT/edunext-ecommerce,edx/ecommerce