Fix colors in organigramm to be wtf-orange/dark-grey/light-grey as specified in ag_kommunikation/wtf_propaganda

organigramm.plantuml

@@ -1,19 +1,20 @@
 @startwbs
 <style>
+// when changing colors double-check https://git.wtf-eg.de/ag_kommunikation/wtf_propaganda
 wbsDiagram {
   BackgroundColor transparent
   node {
     FontColor #000000
-    BackgroundColor #ECEFEB
+    BackgroundColor #EDEFEB
     LineColor #000000
     Shadowing 0.0
   }
   rootnode {
-    FontColor #FD7800
+    FontColor #EF7C21
   }
   arrow {
     // note that connectors are actually "arrows" even if they don't look like arrows
-    LineColor #FD7800
+    LineColor #EF7C21
     LineThickness 2.5
   }
 }