index.html: Clean up indentation and whitespace in HEAD.
index.html: Clean up indentation and whitespace in HEAD.

This is mostly to make our linter happy after removing the conditional
in the previous commit.

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