portico: Fix the partial visibility of zulip-octopus on landing page.
portico: Fix the partial visibility of zulip-octopus on landing page.

The image zulip-octopus.png was not fully visible on the
landing-page due to lesser width thus resulting into an incomplete
image.
tommyip/zulip,punchagan/zulip,shubhamdhama/zulip,kou/zulip,kou/zulip,andersk/zulip,shubhamdhama/zulip,rht/zulip,showell/zulip,hackerkid/zulip,punchagan/zulip,shubhamdhama/zulip,zulip/zulip,rishig/zulip,rishig/zulip,eeshangarg/zulip,zulip/zulip,brainwane/zulip,eeshangarg/zulip,rht/zulip,rishig/zulip,rht/zulip,timabbott/zulip,shubhamdhama/zulip,synicalsyntax/zulip,tommyip/zulip,kou/zulip,showell/zulip,tommyip/zulip,synicalsyntax/zulip,rishig/zulip,zulip/zulip,brainwane/zulip,tommyip/zulip,hackerkid/zulip,punchagan/zulip,timabbott/zulip,synicalsyntax/zulip,rishig/zulip,shubhamdhama/zulip,punchagan/zulip,showell/zulip,andersk/zulip,showell/zulip,eeshangarg/zulip,kou/zulip,brainwane/zulip,timabbott/zulip,timabbott/zulip,zulip/zulip,punchagan/zulip,brainwane/zulip,rht/zulip,eeshangarg/zulip,eeshangarg/zulip,punchagan/zulip,hackerkid/zulip,timabbott/zulip,rht/zulip,tommyip/zulip,andersk/zulip,rht/zulip,synicalsyntax/zulip,tommyip/zulip,rht/zulip,andersk/zulip,timabbott/zulip,eeshangarg/zulip,tommyip/zulip,synicalsyntax/zulip,andersk/zulip,zulip/zulip,showell/zulip,hackerkid/zulip,punchagan/zulip,hackerkid/zulip,hackerkid/zulip,rishig/zulip,zulip/zulip,brainwane/zulip,shubhamdhama/zulip,showell/zulip,brainwane/zulip,synicalsyntax/zulip,synicalsyntax/zulip,hackerkid/zulip,brainwane/zulip,kou/zulip,showell/zulip,kou/zulip,kou/zulip,andersk/zulip,shubhamdhama/zulip,timabbott/zulip,rishig/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip