portico-header: Fix "Find accounts" and "New organization" links.
portico-header: Fix "Find accounts" and "New organization" links.

One of my recent commits added these links but mistakenly rendered
them as list items on our /help pages.

kou/zulip,kou/zulip,andersk/zulip,rht/zulip,rht/zulip,hackerkid/zulip,rht/zulip,kou/zulip,kou/zulip,rht/zulip,andersk/zulip,hackerkid/zulip,zulip/zulip,eeshangarg/zulip,hackerkid/zulip,eeshangarg/zulip,zulip/zulip,eeshangarg/zulip,kou/zulip,hackerkid/zulip,eeshangarg/zulip,rht/zulip,zulip/zulip,kou/zulip,eeshangarg/zulip,hackerkid/zulip,zulip/zulip,zulip/zulip,hackerkid/zulip,andersk/zulip,rht/zulip,andersk/zulip,zulip/zulip,zulip/zulip,andersk/zulip,hackerkid/zulip,rht/zulip,andersk/zulip,kou/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip