Update experiment.html
Update experiment.html

changed experiment_structure to timeline to fit with jspsych 5.0
expfactory/expfactory-python,vsoch/expfactory-python,tangi75/expfactory-python,vsoch/expfactory-python,tangi75/expfactory-python,psiturk/psiturk-python,expfactory/expfactory-python,expfactory/expfactory-python,vsoch/expfactory-python,psiturk/psiturk-python,psiturk/psiturk-python,vsoch/expfactory-python,tangi75/expfactory-python,tangi75/expfactory-python,expfactory/expfactory-python,psiturk/psiturk-python,expfactory/expfactory-python,tangi75/expfactory-python,vsoch/expfactory-python