test_docs: Update tests for recent plans page changes.
test_docs: Update tests for recent plans page changes.

This should have been in b03cab8ced51c95037915e0e24c9f52775a963a9.

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