Update README.md

Author: learning-zone

README.md

@@ -829,7 +829,9 @@ Con:
 
 Here, a balance has to be found, unit-testing some key parts can be beneficial.
 
-
+<div align="right">
+    <b><a href="#">↥ back to top</a></b>
+</div>
 
 ### Don't mock everything
 
@@ -946,6 +948,10 @@ describe('when the user has already visited the page', () => {
 
 The `MemoryStorage` used here does not persist data. Nice and easy, with no side effects.
 
+<div align="right">
+    <b><a href="#">↥ back to top</a></b>
+</div>
+
 #### Takeaway
 
 The idea to keep in mind is that *dependencies can still be "real" objects*. Don't mock everything because you can.