Improve formatting in README.md

Author: MaxDesiatov

README.md

@@ -7,6 +7,8 @@ SwiftWasm book](https://swiftwasm.github.io/swiftwasm-book/) to get started, and
 the [`awesome-swiftwasm`](https://github.com/swiftwasm/awesome-swiftwasm) list for
 more links in the SwiftWasm ecosystem.
 
+<hr>
+<br/>
 <img src="https://swift.org/assets/images/swift.svg" alt="Swift logo" height="70" >
 
 # Swift Programming Language