Use ANGLE_GLES3 for screenshot test runs

Author: Copilot

jme3-screenshot-tests/src/main/java/org/jmonkeyengine/screenshottests/testframework/ScreenshotTest.java

@@ -106,7 +106,7 @@ public void run(){
         settings.setResolution(resolution.getWidth(), resolution.getHeight());
         settings.setAudioRenderer(null); // Disable audio (for headless)
         settings.setUseInput(false); //while it will run with inputs on it causes non-fatal errors.
-        settings.setRenderer(AppSettings.LWJGL_OPENGL45);
+        settings.setRenderer(AppSettings.ANGLE_GLES3);
 
         String imageFilePrefix = baseImageFileName == null ? calculateImageFilePrefix() : baseImageFileName;