docs: fix by proofreading

Co-authored-by: John Paul E. Balandan, CPA <paulbalandan@gmail.com>

Author: kenjis

user_guide_src/source/tutorial/news_section.rst

@@ -166,7 +166,7 @@ add some code to the controller and create a new view. Go back to the
 
 .. literalinclude:: news_section/006.php
 
-Don't forget add ``use CodeIgniter\Exceptions\PageNotFoundException;`` to import
+Don't forget to add ``use CodeIgniter\Exceptions\PageNotFoundException;`` to import
 the ``PageNotFoundException`` class.
 
 Instead of calling the ``getNews()`` method without a parameter, the