Fix `CPUParticles2D.emission_shape` enum hint

(cherry picked from commit e55ba60da18fccb35ed1fceab0db6ada8650891b)

scene/2d/cpu_particles_2d.cpp

@@ -1277,7 +1277,7 @@ void CPUParticles2D::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("_texture_changed"), &CPUParticles2D::_texture_changed);
 
 	ADD_GROUP("Emission Shape", "emission_");
-	ADD_PROPERTY(PropertyInfo(Variant::INT, "emission_shape", PROPERTY_HINT_ENUM, "Point,Sphere,Box,Points,Directed Points", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED), "set_emission_shape", "get_emission_shape");
+	ADD_PROPERTY(PropertyInfo(Variant::INT, "emission_shape", PROPERTY_HINT_ENUM, "Point,Sphere,Rectangle,Points,Directed Points", PROPERTY_USAGE_DEFAULT | PROPERTY_USAGE_UPDATE_ALL_IF_MODIFIED), "set_emission_shape", "get_emission_shape");
 	ADD_PROPERTY(PropertyInfo(Variant::REAL, "emission_sphere_radius", PROPERTY_HINT_RANGE, "0.01,128,0.01,or_greater"), "set_emission_sphere_radius", "get_emission_sphere_radius");
 	ADD_PROPERTY(PropertyInfo(Variant::VECTOR2, "emission_rect_extents"), "set_emission_rect_extents", "get_emission_rect_extents");
 	ADD_PROPERTY(PropertyInfo(Variant::POOL_VECTOR2_ARRAY, "emission_points"), "set_emission_points", "get_emission_points");