minor revisions to open science lessons for clarity

migration of pull request swcarpentry/bc#919

@chinchliff could you please review and provide feedback on these changes?
@jiffyclub I tried to incorporate the bit about pushing for change, but make it more specific than the phrase "simply because what's new is often also frightening". I found that phrase to be more of an indirect jab than a productive solution.

At the same time, I am concerned that this is becoming too verbose. There must be some limit ...