Update teaching team in "reordering datasets" lesson

[epartan]

https://github.com/hbctraining/Intro-to-R-flipped/blob/master/lessons/09_reordering-to-match-datasets.md

Teaching team listed as teaching_team <- c("Jihe", "Mary", "Meeta", "Radhika", "Will", "Emma")

Should update code and figure to match current team