fix(apollo): Fix using Apollo to connect to AppSync in China

[mattcreaser]

• PR title and description conform to Pull Request guidelines.

Issue #, if available: #2945

Description of changes:
In China the AppSync URL has .cn as a TLD, and we weren't account for that in our standard URL regex. I updated the regex to match Amplify JS

How did you test these changes?
Unit test

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.