Exclude unused asset for readme from check

Author: okalachev

check_unused_assets.py

@@ -5,7 +5,7 @@
 import subprocess
 
 EXCLUDE = ('clever4-front-white.png', 'clever4-front-white-large.png', '.DS_Store',
-    'clever4-front-black-large.png','clover42-black.png')
+    'clever4-front-black-large.png','clover42-black.png', 'clover42-main-margin.png')
 
 code = 0