Update panel.yaml

rev 1 restored material icons

panel.yaml

@@ -1,3 +1,10 @@
+substitutions:
+  lightbulb: "\U000F0335"
+  ceiling_light: "\U000F0769"
+  lamp: "\U000F06B5"
+  floor_lamp: "\U000F08DD"
+  string_lights: "\U000F12BA"
+
 esphome:
   name: "panel"
   friendly_name: "Panely"
@@ -395,7 +402,7 @@ font:
     size: 24
     bpp: 4
     extras:
-      - file: "https://cdnjs.cloudflare.com/ajax/libs/MaterialDesign-Webfont/7.4.47/fonts/materialdesignicons-webfont.ttf"
+      - file: 'https://cdnjs.cloudflare.com/ajax/libs/MaterialDesign-Webfont/7.4.47/fonts/materialdesignicons-webfont.ttf'
         glyphs:
           [
             "\U000F004B",
@@ -413,7 +420,7 @@ font:
             "\U000F0091",
           ]
 
-  - file: "https://cdnjs.cloudflare.com/ajax/libs/MaterialDesign-Webfont/7.4.47/fonts/materialdesignicons-webfont.ttf"
+  - file: 'https://cdnjs.cloudflare.com/ajax/libs/MaterialDesign-Webfont/7.4.47/fonts/materialdesignicons-webfont.ttf'
     id: light40
     size: 40
     bpp: 4