fixed sedac descriptions

[minniewong]

Description

Fixes nasa-gibs/worldview#1160 and fixes nasa-gibs/worldview#1161.

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code.

• I have read the CONTRIBUTING doc
• I have added necessary documentation (if appropriate)
• I have added tests that prove my fix is effective or that my feature works
• Lint and unit tests pass locally with my changes (npm run test)
• Any dependent changes have been merged and published in downstream modules

Further comments

If this is a relatively large or complex change, start a discussion by explaining why you chose the solution you did and what alternatives you considered, etc...

@nasa-gibs/worldview

[ZachTRice]

👍