Update Rust crate actix-web to v4.6.0 (#271)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actix-web](https://actix.rs) ([source](https://github.com/actix/actix-web)) | dependencies | minor | `4.5.1` -> `4.6.0` |

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Reviewed-on: #271

src/controllers/login_controller.rs

@@ -143,7 +143,7 @@ pub async fn login_route(
     }
     // Try to authenticate user
     else if let Some(req) = &req {
-        login = req.login.clone();
+        login.clone_from(&req.login);
         let response: LoginResult = users
             .send(users_actor::LocalLoginRequest {
                 login: login.clone(),