Bump WPILib version to 2023.4.1 (#2199)

Author: sciencewhiz

source/docs/zero-to-robot/step-2/wpilib-setup.rst

@@ -18,7 +18,7 @@ WPILib is designed to install to different folders for different years, so that
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-.. wpilibrelease:: v2023.3.2
+.. wpilibrelease:: v2023.4.1
 
 `You can download the latest release of the installer from GitHub <https://github.com/wpilibsuite/allwpilib/releases/latest/>`__.