Fix git pull instructions
Fix git pull instructions

mwest1066/PrairieLearn,rbessick5/PrairieLearn,mwest1066/PrairieLearn,rbessick5/PrairieLearn,PrairieLearn/PrairieLearnHack,mwest1066/PrairieLearn,PrairieLearn/PrairieLearnHack,tbretl/PrairieLearn,parasgithub/PrairieLearn,PrairieLearn/PrairieLearnHack,tbretl/PrairieLearn,tbretl/PrairieLearn,kevinwang/PrairieLearn,parasgithub/PrairieLearn,mwest1066/PrairieLearn,parasgithub/PrairieLearn,parasgithub/PrairieLearn,PrairieLearn/PrairieLearnHack,PrairieLearn/PrairieLearnHack,parasgithub/PrairieLearn,kevinwang/PrairieLearn,kevinwang/PrairieLearn,tbretl/PrairieLearn,kevinwang/PrairieLearn,kevinwang/PrairieLearn,rbessick5/PrairieLearn,rbessick5/PrairieLearn,PrairieLearn/PrairieLearnHack,mwest1066/PrairieLearn,tbretl/PrairieLearn,kevinwang/PrairieLearn,PrairieLearn/PrairieLearnHack,jakebailey/PrairieLearn,kevinwang/PrairieLearn,jakebailey/PrairieLearn,jakebailey/PrairieLearn,PrairieLearn/PrairieLearnHack,rbessick5/PrairieLearn,jakebailey/PrairieLearn