[HttpFoundation] Fix typo for ParameterBag getters

[HttpFoundation] Fix typo for max number of arguments for ParameterBag getters

Author: rendler-denis

Diff for: components/http_foundation/introduction.rst

@@ -140,7 +140,7 @@ has some methods to filter the input values:
 :method:`Symfony\\Component\\HttpFoundation\\ParameterBag::filter`
     Filters the parameter by using the PHP :phpfunction:`filter_var` function.
 
-All getters takes up to three arguments: the first one is the parameter name
+All getters take up to two arguments: the first one is the parameter name
 and the second one is the default value to return if the parameter does not
 exist::