Update README.md

Author: witold-swierzy

data-platform/autonomous-database/autonomous-json/document_format_conversion_api/README.md

@@ -1,7 +1,8 @@
 This repo contains PL/SQL API for document conversion demonstrating how it is possible to abstract from a particular format (XML or JSON) and work on the data.
-**doc** directory contains documentation, including overview presentation and user guide
-**sql** directory contains API code with scripts allowing easy installation and removal
-**demo** directory contains script demonstrating functionality of the API
+
+*doc directory contains documentation, including overview presentation and user guide
+*sql directory contains API code with scripts allowing easy installation and removal
+*demo directory contains script demonstrating functionality of the API
 
 # License