update ChangeLog with "question is complete" bug fix
update ChangeLog with "question is complete" bug fix

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