middleware: Change render_to_response to render.
middleware: Change render_to_response to render.

Related to #4093

vaidap/zulip,brockwhittaker/zulip,jrowan/zulip,jainayush975/zulip,brockwhittaker/zulip,dawran6/zulip,tommyip/zulip,eeshangarg/zulip,jrowan/zulip,vaidap/zulip,kou/zulip,Galexrt/zulip,kou/zulip,jphilipsen05/zulip,timabbott/zulip,rishig/zulip,Galexrt/zulip,dhcrzf/zulip,eeshangarg/zulip,JPJPJPOPOP/zulip,shubhamdhama/zulip,jphilipsen05/zulip,dawran6/zulip,brockwhittaker/zulip,eeshangarg/zulip,hackerkid/zulip,rht/zulip,jphilipsen05/zulip,zulip/zulip,verma-varsha/zulip,jainayush975/zulip,rht/zulip,synicalsyntax/zulip,j831/zulip,eeshangarg/zulip,Galexrt/zulip,j831/zulip,showell/zulip,Galexrt/zulip,susansls/zulip,SmartPeople/zulip,susansls/zulip,dhcrzf/zulip,zulip/zulip,eeshangarg/zulip,brainwane/zulip,susansls/zulip,synicalsyntax/zulip,andersk/zulip,andersk/zulip,vaidap/zulip,jackrzhang/zulip,aakash-cr7/zulip,vaidap/zulip,JPJPJPOPOP/zulip,vaidap/zulip,mahim97/zulip,showell/zulip,Galexrt/zulip,jrowan/zulip,verma-varsha/zulip,jainayush975/zulip,hackerkid/zulip,Galexrt/zulip,tommyip/zulip,jainayush975/zulip,shubhamdhama/zulip,brockwhittaker/zulip,rishig/zulip,aakash-cr7/zulip,kou/zulip,verma-varsha/zulip,mahim97/zulip,eeshangarg/zulip,tommyip/zulip,jrowan/zulip,jackrzhang/zulip,showell/zulip,jphilipsen05/zulip,andersk/zulip,mahim97/zulip,jrowan/zulip,SmartPeople/zulip,jphilipsen05/zulip,hackerkid/zulip,amanharitsh123/zulip,JPJPJPOPOP/zulip,ryanbackman/zulip,JPJPJPOPOP/zulip,rishig/zulip,jackrzhang/zulip,SmartPeople/zulip,rht/zulip,andersk/zulip,vabs22/zulip,dawran6/zulip,vabs22/zulip,brockwhittaker/zulip,brainwane/zulip,SmartPeople/zulip,brockwhittaker/zulip,tommyip/zulip,ryanbackman/zulip,susansls/zulip,JPJPJPOPOP/zulip,punchagan/zulip,aakash-cr7/zulip,timabbott/zulip,Galexrt/zulip,susansls/zulip,verma-varsha/zulip,vabs22/zulip,timabbott/zulip,kou/zulip,showell/zulip,punchagan/zulip,j831/zulip,zulip/zulip,rishig/zulip,tommyip/zulip,jainayush975/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,SmartPeople/zulip,punchagan/zulip,andersk/zulip,hackerkid/zulip,amanharitsh123/zulip,christi3k/zulip,shubhamdhama/zulip,synicalsyntax/zulip,rishig/zulip,SmartPeople/zulip,ryanbackman/zulip,dawran6/zulip,dawran6/zulip,timabbott/zulip,tommyip/zulip,j831/zulip,christi3k/zulip,susansls/zulip,dhcrzf/zulip,JPJPJPOPOP/zulip,zulip/zulip,vabs22/zulip,dhcrzf/zulip,synicalsyntax/zulip,timabbott/zulip,dhcrzf/zulip,rishig/zulip,amanharitsh123/zulip,jainayush975/zulip,timabbott/zulip,synicalsyntax/zulip,synicalsyntax/zulip,ryanbackman/zulip,shubhamdhama/zulip,j831/zulip,synicalsyntax/zulip,shubhamdhama/zulip,brainwane/zulip,shubhamdhama/zulip,rht/zulip,hackerkid/zulip,andersk/zulip,christi3k/zulip,christi3k/zulip,showell/zulip,rht/zulip,kou/zulip,brainwane/zulip,mahim97/zulip,brainwane/zulip,dhcrzf/zulip,zulip/zulip,j831/zulip,dawran6/zulip,shubhamdhama/zulip,christi3k/zulip,jphilipsen05/zulip,tommyip/zulip,mahim97/zulip,punchagan/zulip,eeshangarg/zulip,mahim97/zulip,punchagan/zulip,aakash-cr7/zulip,ryanbackman/zulip,timabbott/zulip,amanharitsh123/zulip,kou/zulip,zulip/zulip,brainwane/zulip,kou/zulip,ryanbackman/zulip,jrowan/zulip,jackrzhang/zulip,punchagan/zulip,aakash-cr7/zulip,rht/zulip,christi3k/zulip,rishig/zulip,showell/zulip,amanharitsh123/zulip,rht/zulip,showell/zulip,andersk/zulip,jackrzhang/zulip,brainwane/zulip,aakash-cr7/zulip,jackrzhang/zulip,hackerkid/zulip,amanharitsh123/zulip,verma-varsha/zulip,vabs22/zulip,jackrzhang/zulip,vabs22/zulip,dhcrzf/zulip,vaidap/zulip,verma-varsha/zulip