docs: Update README.md

README.md

@@ -1,9 +1,9 @@
-Xorm Adapter
+# Xorm Adapter
+
 [![Go](https://github.com/casbin/xorm-adapter/actions/workflows/ci.yml/badge.svg)](https://github.com/casbin/xorm-adapter/actions/workflows/ci.yml)
 [![Coverage Status](https://coveralls.io/repos/github/casbin/xorm-adapter/badge.svg?branch=master)](https://coveralls.io/github/casbin/xorm-adapter?branch=master)
 [![Go Report Card](https://goreportcard.com/badge/github.com/casbin/xorm-adapter)](https://goreportcard.com/report/github.com/casbin/xorm-adapter)
 [![Godoc](https://godoc.org/github.com/casbin/xorm-adapter?status.svg)](https://godoc.org/github.com/casbin/xorm-adapter)
----
 
 Xorm Adapter is the [Xorm](https://gitea.com/xorm/xorm) adapter for [Casbin](https://github.com/casbin/casbin). With this library, Casbin can load policy from Xorm supported database or save policy to it.