[Bug] Change the year in the copyright of website footer

[skwowet]

Describe the bug The copyright year mentioned in the footer seems to be outdated.

To Reproduce Steps to reproduce the behavior:

1. Go to appflowy website
2. Scroll down footer area at the bottom
3. See copyright area and the year mentioned

Expected behavior We could either update the current year in the copyright, or maybe something like this would also work 2021 - present

Screenshots