Merge pull request 'Update readme.md' (#777) from a1e5Term-rf-ln/ly:new1 into master

Reviewed-on: https://codeberg.org/AnErrupTion/ly/pulls/777
Reviewed-by: AnErrupTion <anerruption@disroot.org>

readme.md

@@ -78,6 +78,14 @@ Install Ly for systemd-based systems (the default)
 # zig build installexe
 ```
 
+Instead of DISPLAY_MANAGER you need to add your DM:
+- gdm.service
+- sddm.service
+- lightdm.service
+```
+# systemctl disable DISPLAY_MANAGER
+```
+
 Enable the service
 ```
 # systemctl enable ly.service