flashfocus only works on arch-lts

configs/picom_l/README.md

@@ -1,3 +1,4 @@
 ## Picom configs
 *picom_default.conf* - Default config not much has been changed/editted
 *picom.conf* - Minimal config, with just a few options, no animation, and includes `flashfocus` needed options
+ - `flashfocus` only works on `arch-lts` kernel