documentation demonstrates incorrect key generation

[robjtede]

in both the readme and crate docs you have this snippet:

    HttpServer::new(move || {
        App::new()
            .wrap(
                SessionMiddleware::builder(session_store.clone(), Key::generate())

this is very subtly incorrect as it will generate a different key for each server worker

please amend it to

    let key = Key::generate();

    HttpServer::new(move || {
        App::new()
            .wrap(
                SessionMiddleware::builder(session_store.clone(), key.clone())

and publish a new release so users of this crate can copy-paste from the updated crates.io page

[ixhbinphoenix]

Thank you for opening an issue for this, would have never noticed that

[robjtede]

fixed the other occurence in #3