minor #20351 [ExpressionLanguage] fix lint method description (decima)

This PR was submitted for the 7.1 branch but it was merged into the 6.4 branch instead.

Discussion
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[ExpressionLanguage] fix lint method description

At first, I made a fix pr [#58679](symfony/symfony#58679), but someone suggested to make a doc fix.

I think it's pretty weird to have a linting method throwing exception as its task is to tell if the expression is valid or not. 🤔

Commits
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d558cc8 updating expression language documentation

Author: javiereguiluz

components/expression_language.rst

@@ -93,7 +93,7 @@ The :method:`Symfony\\Component\\ExpressionLanguage\\ExpressionLanguage::parse`
 method returns a :class:`Symfony\\Component\\ExpressionLanguage\\ParsedExpression`
 instance that can be used to inspect and manipulate the expression. The
 :method:`Symfony\\Component\\ExpressionLanguage\\ExpressionLanguage::lint`, on the
-other hand, returns a boolean indicating if the expression is valid or not::
+other hand, throws a :class:`Symfony\\Component\\ExpressionLanguage\\SyntaxError` if the expression is not valid::
 
     use Symfony\Component\ExpressionLanguage\ExpressionLanguage;
 
@@ -103,7 +103,7 @@ other hand, returns a boolean indicating if the expression is valid or not::
     // displays the AST nodes of the expression which can be
     // inspected and manipulated
 
-    var_dump($expressionLanguage->lint('1 + 2', [])); // displays true
+    $expressionLanguage->lint('1 + 2', []); // doesn't throw anything
 
 Passing in Variables
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