[Bug] Mailing list URL on support page unauthorized

**Describe the bug**
Mailing list URL on support page (https://groups.google.com/d/forum/kepler-gl) leads to a Google Group that can't be joined by an @gmail.com address. I tested another GSuite domain that I own and that didn't work either. I suspect either access to this Google Group is limited by domain or that it is inactive in some way.

**To Reproduce**
Steps to reproduce the behavior:
1. Go to https://kepler.gl/policy
2. Click on [Kepler.gl Mailing list](https://groups.google.com/d/forum/kepler-gl)
3. Observe a 403 forbidden error when using an @gmail.com account

**Expected behavior**
Expected to be able to join mailing list.

**Additional context**
Is this mailing list still active? If not, should it be removed?

**Desktop (please complete the following information):**
- OS: MacOS Monterey 12.5.1
- Browser: Tested in Safari and Chrome
- Version: Chrome Version 106.0.5249.119 (Official Build) (arm64), Safari Version 15.6.1 (17613.3.9.1.16)

Start at https://kepler.gl/policy and inspect the Kepler.gl Mailing list link. Verify whether the linked Google Group is accessible to Gmail or GSuite users; done means the support page points to a usable mailing list or no longer includes the inactive link.

Written by the indexing model from the issue text.