Remove "too wide" bug from README.md
Remove "too wide" bug from README.md

Test Plan: none

sachgits/perseus,ariabuckles/perseus,iamchenxin/perseus,abe4mvp/perseus,chirilo/perseus,ariabuckles/perseus,ariabuckles/perseus,huangins/perseus,daukantas/perseus,alexristich/perseus,huangins/perseus,daukantas/perseus,abe4mvp/perseus,iamchenxin/perseus,junyiacademy/perseus,sachgits/perseus,chirilo/perseus,learningequality/perseus,junyiacademy/perseus,alexristich/perseus,learningequality/perseus,ariabuckles/perseus