Add v3.0 Labels

[mplsmitch]

This PR contains some small editorial changes to label a few fields that had name changes from v2.3 to v3.0. You can find additional discussion of this topic in #796

This will not require a vote and can be included in the next minor version release candidate.

Is this a breaking change?

• [ ] Yes
• [x] No
• [ ] Unsure

Which files are affected by this change?