[docs]: Routing - timeLog not defined (#1410)

* [docs]: Routing - `timeLog` not defined

Either have a function named `timeLog` or reword the last sentence of the page to remove the use of that name.

* Update routing.md

Remove EOL colons to conform with doc code style

---------

Co-authored-by: Rand McKinney <crandmck@yahoo.com>

en/guide/routing.md

@@ -325,10 +325,12 @@ const express = require('express')
 const router = express.Router()
 
 // middleware that is specific to this router
-router.use((req, res, next) => {
+const timeLog = (req, res, next) => {
   console.log('Time: ', Date.now())
   next()
-})
+}
+router.use(timeLog)
+
 // define the home page route
 router.get('/', (req, res) => {
   res.send('Birds home page')