Documentation fix
Documentation fix

Zephor5/pika,renshawbay/pika-python3,skftn/pika,knowsis/pika,benjamin9999/pika,Tarsbot/pika,fkarb/pika-python3,pika/pika,jstnlef/pika,vrtsystems/pika,hugoxia/pika,reddec/pika,zixiliuyue/pika,vitaly-krugl/pika,shinji-s/pika