Fix syntax bug in readme file

In this url

https://github.com/goldbergyoni/javascript-testing-best-practices#-%EF%B8%8F29-isolate-the-component-from-the-world-using-http-interceptor

There is a syntax error in the Code Examples section that causes the next item to be included in the code example.

Author: aliazmoodehvaldi

readme.md

@@ -1020,7 +1020,8 @@ beforeEach(() => {
     id: 1,
     name: 'John',
   });
-});```
+});
+```
 
 </details>