fix(elk): disable saturation filter

[uncenter]

🔧 What does this fix? 🔧

Fixes that button being a different color than the background.

🗒 Checklist 🗒

• [x] I have read and followed Catppuccin's contributing guidelines.
• [x] I have updated the version appropriately in the ==UserStyle== header of the catppuccin.user.css file.