demo: fix text_color_light

exampleSite/content/home/posts.md

@@ -55,7 +55,7 @@ subtitle = ""
   # image_darken = 0.6  # Darken the image? Range 0-1 where 0 is transparent and 1 is opaque.
 
   # Text color (true=light or false=dark).
-  text_color_light = true  
+  # text_color_light = true  
   
 [advanced]
  # Custom CSS.