awww -> awww + swaybg

顺便修修readme：减少md代码块以应对ly gitea黑色主题的蜜汁渲染

.config/niri/config.kdl

@@ -126,7 +126,7 @@ overview {
 }
 
 layer-rule {
-    match namespace="^swww-daemonblur$"
+    match namespace="^wallpaper$"
     place-within-backdrop true
 }
 
@@ -181,8 +181,8 @@ include "config-keyboard.kdl"
 
 // spawn-at-startup "waybar"   // 建议交给 systemctl --user，它自己没法热重载。
 // spawn-sh-at-startup  "wl-paste --watch cliphist store"
-spawn-at-startup "swww-daemon"
-spawn-at-startup "swww-daemon" "--namespace" "blur"
+spawn-at-startup "awww-daemon"
+// spawn-at-startup "awww-daemon" "--namespace" "blur"
 spawn-at-startup "xwayland-satellite"
 spawn-at-startup "/usr/lib/pam_kwallet_init"