feat(NODE-6309): Mark range API as stable

[baileympearson]

Description

What is changing?

Is there new documentation needed for these changes?

What is the motivation for this change?

Release Highlight

Fill in title or leave empty for no highlight

Double check the following

• [ ] Ran npm run check:lint script
• [ ] Self-review completed using the steps outlined here
• [ ] PR title follows the correct format: type(NODE-xxxx)[!]: description
  • Example: feat(NODE-1234)!: rewriting everything in coffeescript
• [ ] Changes are covered by tests
• [ ] New TODOs have a related JIRA ticket