Update filter name for customizing the query arguments used to fetch the courses a user is enrolled in

[donnapep]

Changes proposed in this Pull Request

After reviewing #3347, I realized that the filter should be called sensei_learner_enrolled_courses_args to be consistent with the other hooks in this class.

Testing instructions

• Add the following snippet:

add_filter(
	'sensei_learner_enrolled_courses_args',
	function( $args, $user_id ) {
		error_log( $user_id);
		error_log( print_r($args,true) );

		return $args;
	},
	10,
	2
);

• Navigate to 'My courses' page and observe that the arguments are logged.

New/Updated Hooks

• sensei_learner_enrolled_courses_args - Customize the query arguments used to fetch the courses a learner is enrolled in.

[gikaragia]

Looks good!