Add nsidc org trusted sources

[trey-stafford]

Overview

NSIDC will host the Data Access Tool's backend services at nsidc.org. This PR adds the nsidc.org domains to the trusted sources list.

What is the feature?

This PR adds the nsidc.org domains to the trusted sources list.

What is the Solution?

Updated trustedSources.json

What areas of the application does this impact?

Just the list of trusted sources.

Testing

Reproduction steps

No new tests.

Checklist

• I have added automated tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have bumped the version field in package.json and ran npm install