Set appropriate title to checkout

Author: MarkNjunge

app/src/main/java/com/marknkamau/justjava/ui/checkout/CheckoutActivity.kt

@@ -44,6 +44,7 @@ class CheckoutActivity : BaseActivity(), CheckoutView {
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_checkout)
+        supportActionBar?.title = "Checkout"
 
         presenter = CheckoutPresenter(this, authService, preferencesRepository, databaseService, cartDao)