bug #3441 [Expression]Change title 'Accessing Public Methods' (Pyrech)

This PR was submitted for the master branch but it was merged into the 2.4 branch instead (closes #3441).

Discussion
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[Expression]Change title 'Accessing Public Methods'

Change title 'Accessing Public Methods' to 'Accessing Public Properties' because it's more in relation with the content.

Commits
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b0e65e7 fixe tagline
8fc4ef8 Change title 'Accessing Public Methods'

components/expression_language/syntax.rst

@@ -28,8 +28,8 @@ Working with Objects
 When passing objects into an expression, you can use different syntaxes to
 access properties and call methods on the object.
 
-Accessing Public Methods
-~~~~~~~~~~~~~~~~~~~~~~~~
+Accessing Public Properties
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Public properties on objects can be accessed by using the ``.`` syntax, similar
 to JavaScript::