hyprland(hycov): Disable alt_release_exit

This fixes an issue where hycov would prematurely exit when using the
Alt+Tab keybind. Instead, it's preferred to use the navigation keys to
switch focus and press tab again to close hycov.

home/hyprland.nix

@@ -352,7 +352,6 @@ in
       hycov {
         hotarea_pos = 2
         enable_gesture = 1
-        enable_alt_release_exit = 1
       }
     }