Added webgl_postprocessing_crossfade to e2e exception list.

test/e2e/puppeteer.js

@@ -31,6 +31,7 @@ const exceptionList = [
 	'webgl_loader_texture_lottie', // not sure why this fails
 	'webgl_loader_texture_pvrtc', // not supported in CI, useless
 	'webgl_materials_standard_nodes', // puppeteer does not support import maps yet
+	'webgl_postprocessing_crossfade', // fails for some misterious reason
 	'webgl_raymarching_reflect', // exception for Github Actions
 	'webgl_test_memory2', // gives fatal error in puppeteer
 	'webgl_tiled_forward', // exception for Github Actions