Correct Typo ceterms:targetLearningResource

[jeannekitchens]

Correct the Definition: Learning object or resource that is used as part of an learning activity.

To: Learning object or resource that is used as part of a learning activity.

[siuc-nate]

We can collect all of the typos into a single github issue - no need to make a separate one for each. Technically, typos don't really require a formal change anyway since they aren't intentional, so you can just send them to me when you find them and I can fix them. The only time we might need an issue is if correcting a typo changes the meaning of the text (e.g. "do" instead of "don't")