Rename rigid-body static to fixed

benchmarks2d/joint_fixed2.rs

@@ -32,7 +32,7 @@ pub fn init_world(testbed: &mut Testbed) {
                     let fi = i as f32;
 
                     let status = if k == 0 {
-                        RigidBodyType::Static
+                        RigidBodyType::Fixed
                     } else {
                         RigidBodyType::Dynamic
                     };