Added link to LiquidEarth website

Description

Please include a summary of the changes.

Relates to

Checklist

[ ] My code follows the PEP 8 style guidelines.
[ ] My code uses type hinting for function and method arguments and return values.
[ ] My code contains descriptive and helpful docstrings which are formatted per the Google Python Style Guidelines.
[ ] I have created tests which entirely cover my code.
[ ] The test code either 1. demonstrates at least one valuable use case (e.g. integration tests) or 2. verifies that outputs are as expected for given inputs (e.g. unit tests).
[ ] New and existing tests pass locally with my changes.