portico: Use sentence-casing for headings on /security.
portico: Use sentence-casing for headings on /security.

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