docs(basic-routing.md): align wording with the rest of document (#1966)

Co-authored-by: bjohansebas <103585995+bjohansebas@users.noreply.github.com>
Co-authored-by: ShubhamOulkar <91728992+ShubhamOulkar@users.noreply.github.com>

Author: 3 people

en/starter/basic-routing.md

@@ -39,7 +39,7 @@ app.get('/', (req, res) => {
 })
 ```
 
-Respond to POST request on the root route (`/`), the application's home page:
+Respond to a POST request on the root route (`/`), the application's home page:
 
 ```js
 app.post('/', (req, res) => {
@@ -65,4 +65,4 @@ app.delete('/user', (req, res) => {
 
 For more details about routing, see the [routing guide](/{{ page.lang }}/guide/routing.html).
 
-###  [Previous: Express application generator ](/{{ page.lang }}/starter/generator.html)    [Next: Serving static files in Express ](/{{ page.lang }}/starter/static-files.html)
+###  [Previous: Express application generator ](/{{ page.lang }}/starter/generator.html)    [Next: Serving static files in Express ](/{{ page.lang }}/starter/static-files.html)