Change function order in functions (7.1) example

Part 7.1 says first why function declarations are not good and
after that it recommends to give a name to function expression.
The same order could be used in example too.

Author: floftar

README.md

@@ -580,14 +580,14 @@ Other Style Guides
 
     ```javascript
     // bad
-    const foo = function () {
+    function foo() {
       // ...
-    };
+    }
 
     // bad
-    function foo() {
+    const foo = function () {
       // ...
-    }
+    };
 
     // good
     const foo = function bar() {