minor #4625 Added '-ing' title ending to unify titles look (kix)

This PR was submitted for the 2.6 branch but it was merged into the 2.3 branch instead (closes #4625).

Discussion
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Added '-ing' title ending to unify titles look

Currently all of the titles in Console section use gerund, but not this one.

Commits
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74b75de Added '-ing' title ending to unify titles look

components/console/console_arguments.rst

@@ -1,8 +1,10 @@
 .. index::
     single: Console; Console arguments
 
-Understand how Console Arguments are Handled
-============================================
+.. _understand-how-console-arguments-are-handled:
+
+Understanding how Console Arguments Are Handled
+===============================================
 
 It can be difficult to understand the way arguments are handled by the console application.
 The Symfony Console application, like many other CLI utility tools, follows the behavior