Add reason config example for disallowed_type
Add reason config example for disallowed_type

Co-authored-by: James Hinshelwood <b4812c3831b8fa3c0035878700355f9511a6391f@bigpayme.com>

graydon/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust