Indent changelog markdown code to highlight correctly

[ci skip]

actionpack/CHANGELOG.md

@@ -6,7 +6,7 @@
           resources :users
         end
 
-    also is possible pass multiple symbols to scope to shorten multiple nested scopes:
+    It is also possible to pass multiple symbols to scope to shorten multiple nested scopes:
 
         scope :api do
           scope :v1 do