minor #1047 updated instruction wording in comment (httpoz)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes #1047).

Discussion
----------

updated instruction wording in comment

Commits
-------

96d15dc updated wording in comment

Author: fabpot

app/config/parameters.yml.dist

@@ -7,7 +7,7 @@ parameters:
     database_name:     symfony
     database_user:     root
     database_password: ~
-    # You should uncomment this if you want use pdo_sqlite
+    # You should uncomment this if you want to use pdo_sqlite
     # database_path: "%kernel.root_dir%/data.db3"
 
     mailer_transport:  smtp