Correct Typo & initialize AprilTagFieldLayout correctly (#268)

* Correct typo

* Include correct AprilTagFieldLayout initialization

Author: rshah713

source/docs/programming/photonlib/robot-pose-estimator.rst

@@ -15,7 +15,7 @@ The API documentation can be found in here: `Java <https://github.wpilib.org/all
    .. code-block:: java
 
       // The parameter for loadFromResource() will be different depending on the game.
-      AprilTagFieldLayout aprilTagFieldLayout = new ApriltagFieldLayout(AprilTagFieldLayout.loadFromResource(AprilTagFields.k2022RapidReact.m_resourceFile));
+      AprilTagFieldLayout aprilTagFieldLayout = AprilTagFieldLayout.loadFromResource(AprilTagFields.k2023ChargedUp.m_resourceFile);
 
    .. code-block:: c++