Fix the attribute name

site-cookbooks/kosmos-bitcoin/recipes/snapd.rb

@@ -65,7 +65,7 @@ directory "/home/#{bitcoin_user}/snap/bitcoin-core/common/.bitcoin" do
 end
 
 mount "/home/#{bitcoin_user}/snap/bitcoin-core/common/.bitcoin" do
-  device node['bitcoin']['data_dir']
+  device node['bitcoin']['datadir']
   fstype 'none'
   options 'bind'
   action [:mount]