Split concern inclusion in two lines for clarity

Order is inverted when inlined, which can make things difficult to read.

https://github.com/rails/rails/pull/41659#discussion_r592604925

In this case it doesn't really matter and I think it's better for `Configurable`
to go first, so the change is inverting the previous order deliberately.

[skip ci]

activerecord/lib/active_record/encryption.rb

@@ -41,7 +41,8 @@ class Cipher
       end
     end
 
-    include Configurable, Contexts
+    include Configurable
+    include Contexts
 
     def self.eager_load!
       super