Update bot.py

Author: kyb3r

bot.py

@@ -150,6 +150,7 @@ def help_embed(self):
         em.add_field(name='Commands', value=cmds)
         em.add_field(name='Warning', value=warn)
         em.add_field(name='Github', value='https://github.com/verixx/modmail')
+        em.set_footer(text='Star the repository to unlock hidden features!')
 
         return em