portico: Adjust integration padding.
portico: Adjust integration padding.

The integrations box on the landing page had some extra padding
at the bottom. This removes it so the spacing is more even.

jackrzhang/zulip,rht/zulip,tommyip/zulip,punchagan/zulip,shubhamdhama/zulip,dhcrzf/zulip,jackrzhang/zulip,zulip/zulip,eeshangarg/zulip,timabbott/zulip,hackerkid/zulip,dhcrzf/zulip,punchagan/zulip,rht/zulip,kou/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,andersk/zulip,eeshangarg/zulip,andersk/zulip,kou/zulip,rht/zulip,brainwane/zulip,brainwane/zulip,kou/zulip,rishig/zulip,eeshangarg/zulip,punchagan/zulip,eeshangarg/zulip,zulip/zulip,showell/zulip,synicalsyntax/zulip,synicalsyntax/zulip,hackerkid/zulip,rht/zulip,rishig/zulip,tommyip/zulip,hackerkid/zulip,showell/zulip,dhcrzf/zulip,kou/zulip,zulip/zulip,rishig/zulip,tommyip/zulip,shubhamdhama/zulip,jackrzhang/zulip,timabbott/zulip,eeshangarg/zulip,andersk/zulip,shubhamdhama/zulip,synicalsyntax/zulip,zulip/zulip,timabbott/zulip,jackrzhang/zulip,hackerkid/zulip,synicalsyntax/zulip,showell/zulip,brainwane/zulip,andersk/zulip,showell/zulip,tommyip/zulip,showell/zulip,jackrzhang/zulip,shubhamdhama/zulip,timabbott/zulip,dhcrzf/zulip,synicalsyntax/zulip,brainwane/zulip,dhcrzf/zulip,punchagan/zulip,andersk/zulip,synicalsyntax/zulip,hackerkid/zulip,showell/zulip,showell/zulip,tommyip/zulip,rishig/zulip,punchagan/zulip,rishig/zulip,rht/zulip,rishig/zulip,brainwane/zulip,jackrzhang/zulip,brainwane/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,punchagan/zulip,rht/zulip,dhcrzf/zulip,shubhamdhama/zulip,zulip/zulip,punchagan/zulip,tommyip/zulip,shubhamdhama/zulip,kou/zulip,timabbott/zulip,timabbott/zulip,kou/zulip,synicalsyntax/zulip,rishig/zulip,dhcrzf/zulip,hackerkid/zulip,andersk/zulip,tommyip/zulip,timabbott/zulip,brainwane/zulip,rht/zulip,zulip/zulip,jackrzhang/zulip,shubhamdhama/zulip