Update README.md

Author: BhumikaSaini

README.md

@@ -22,10 +22,10 @@ Building the virtual machine is this easy:
     host $ cd rails-dev-box
     host $ vagrant up
 
-If prompted for login credentials in the **VirtualBox VM**, use:  
+If prompted for login credentials in the **VirtualBox VM**, enter:  
 
-**Username:** `vagrant`  
-**Password:** `vagrant`
+Username: `vagrant`  
+Password: `vagrant`
 
 That's it.