docs: Fix typo in plans.html
docs: Fix typo in plans.html

zulip/zulip,rishig/zulip,synicalsyntax/zulip,andersk/zulip,shubhamdhama/zulip,timabbott/zulip,eeshangarg/zulip,hackerkid/zulip,eeshangarg/zulip,showell/zulip,dhcrzf/zulip,zulip/zulip,kou/zulip,rht/zulip,andersk/zulip,brainwane/zulip,tommyip/zulip,shubhamdhama/zulip,eeshangarg/zulip,punchagan/zulip,timabbott/zulip,andersk/zulip,rishig/zulip,shubhamdhama/zulip,punchagan/zulip,brainwane/zulip,showell/zulip,tommyip/zulip,synicalsyntax/zulip,punchagan/zulip,jackrzhang/zulip,dhcrzf/zulip,rishig/zulip,shubhamdhama/zulip,zulip/zulip,brainwane/zulip,showell/zulip,synicalsyntax/zulip,shubhamdhama/zulip,kou/zulip,showell/zulip,jackrzhang/zulip,shubhamdhama/zulip,shubhamdhama/zulip,brainwane/zulip,mahim97/zulip,rht/zulip,showell/zulip,rht/zulip,timabbott/zulip,dhcrzf/zulip,zulip/zulip,rht/zulip,brainwane/zulip,punchagan/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,brainwane/zulip,rht/zulip,jackrzhang/zulip,rishig/zulip,timabbott/zulip,rishig/zulip,andersk/zulip,mahim97/zulip,synicalsyntax/zulip,andersk/zulip,synicalsyntax/zulip,andersk/zulip,synicalsyntax/zulip,showell/zulip,brainwane/zulip,zulip/zulip,dhcrzf/zulip,hackerkid/zulip,showell/zulip,punchagan/zulip,tommyip/zulip,eeshangarg/zulip,hackerkid/zulip,jackrzhang/zulip,andersk/zulip,rht/zulip,hackerkid/zulip,kou/zulip,eeshangarg/zulip,jackrzhang/zulip,jackrzhang/zulip,tommyip/zulip,rishig/zulip,timabbott/zulip,tommyip/zulip,hackerkid/zulip,kou/zulip,kou/zulip,timabbott/zulip,tommyip/zulip,rishig/zulip,punchagan/zulip,hackerkid/zulip,dhcrzf/zulip,zulip/zulip,mahim97/zulip,kou/zulip,synicalsyntax/zulip,mahim97/zulip,dhcrzf/zulip,dhcrzf/zulip,timabbott/zulip,mahim97/zulip,tommyip/zulip,zulip/zulip,jackrzhang/zulip,eeshangarg/zulip,eeshangarg/zulip,mahim97/zulip,rht/zulip