[docs] Fix an sphinx indentation issue.
[docs] Fix an sphinx indentation issue.

mwilliams3/disco,ktkt2009/disco,simudream/disco,pooya/disco,ktkt2009/disco,pooya/disco,pombredanne/disco,mozilla/disco,simudream/disco,pombredanne/disco,mozilla/disco,simudream/disco,oldmantaiter/disco,simudream/disco,beni55/disco,oldmantaiter/disco,mozilla/disco,discoproject/disco,simudream/disco,ErikDubbelboer/disco,mwilliams3/disco,pombredanne/disco,seabirdzh/disco,ktkt2009/disco,mwilliams3/disco,beni55/disco,discoproject/disco,mwilliams3/disco,ktkt2009/disco,oldmantaiter/disco,pooya/disco,mozilla/disco,beni55/disco,beni55/disco,seabirdzh/disco,seabirdzh/disco,oldmantaiter/disco,pombredanne/disco,mwilliams3/disco,seabirdzh/disco,ErikDubbelboer/disco,oldmantaiter/disco,seabirdzh/disco,discoproject/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,beni55/disco,ErikDubbelboer/disco,discoproject/disco,ktkt2009/disco,pooya/disco,discoproject/disco,pombredanne/disco