mkdocs: Fix bullet list rendering

DISCLOSURE_POLICY.md

@@ -12,6 +12,7 @@ Do not execute on or exploit any vulnerability.  This includes testnet, as both
 ## Reporting a Bug or Vulnerability
 
 When reporting a bug or vulnerability, please provide the following to security@bitcoincashnode.org:
+
 * A short summary of the potential impact of the issue (if known).
 * Details explaining how to reproduce the issue or how an exploit may be formed.
 * Your name (optional).  If provided, we will provide credit for disclosure.  Otherwise, you will be treated anonymously and your privacy will be respected.