fix meshlet example (#14471)

# Objective

- meshlet example has broken since #14273

## Solution

- disable msaa in meshlet example

Co-authored-by: François Mockers <mockersf@gmail.com>

examples/3d/meshlet.rs

@@ -50,6 +50,7 @@ fn setup(
         Camera3dBundle {
             transform: Transform::from_translation(Vec3::new(1.8, 0.4, -0.1))
                 .looking_at(Vec3::ZERO, Vec3::Y),
+            msaa: Msaa::Off,
             ..default()
         },
         EnvironmentMapLight {