Update reference to kawaii logo

This is not an official logo and only exists on the website. Remove
mention of the author repository as the artwork isn't actually present
there.

Fixes: AsahiLinux#68

Signed-off-by: Davide Cavalca <[email protected]>

Author: davide125

Diff for: content/about.md

@@ -24,7 +24,7 @@ The Asahi Linux logo and website were designed by [soundflora*](https://soundflo
 
 <img src="/img/AsahiLinux_kawaii_logo.png" alt="Kawaii Asahi Linux logo" width="100">
 
-Kawaii Asahi Linux logo by [SAWARATSUKI](https://twitter.com/sawaratsuki1004). You can find the logo artwork [here](https://github.com/SAWARATSUKI/Logos). Click to \[[enable](/about/?kawaii=true)・[disable](/about/?kawaii=false)\] kawaii mode.
+Kawaii Asahi Linux logo by [SAWARATSUKI](https://twitter.com/sawaratsuki1004). Click to \[[enable](/about/?kawaii=true)・[disable](/about/?kawaii=false)\] kawaii mode.
 
 # FAQ