Update README.md

Author: lganzzzo

README.md

@@ -1,7 +1,7 @@
 # oatpp-postgresql [![Build Status](https://dev.azure.com/lganzzzo/lganzzzo/_apis/build/status/oatpp.oatpp-postgresql?branchName=master)](https://dev.azure.com/lganzzzo/lganzzzo/_build/latest?definitionId=31&branchName=master)
 
 Oat++ ORM adapter for PostgreSQL.  
-*Note: this alpha version, which means that not all PostgreSQL data-types are supported.*
+*Note: this **alpha version**, which means that not all PostgreSQL data-types are supported.*
 
 More about Oat++: