Add missing docstring parameter

[LoLei]

Description

SuiteCRM 8.9 added this class member in NavbarHandler.php:

/**
 * @var array
 */
protected $navbarOverrides;

Commit: a387c6b

However it was missed to be added to the list of constructor docstring parameters.

Motivation and Context

This missing docstring parameter misaligns the list of docstring parameters with the actual constructor parameters.

How To Test This

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Documentation change

Final checklist

• My code follows the code style of this project found here.
• My change requires a change to the documentation.
• I have read the How to Contribute guidelines.