Replace references to nwc.getalby.com

[rolznz]

In src/nwc/NWCClient.test.ts we point to nwc.getalby.com which has been shutdown. Also ensure the test still works with my.albyhub.com or a locally-running alby hub.

[DSanich]

@rolznz Hi! I think I can take this on. By the way, I'm ready to continue working on the tests. Could you please tell me if there are any other important tasks besides working on them? I could take them on as well.

[DSanich]

@rolznz created PR for replace it 🙏

[rolznz]

@DSanich if you're interested, you could have a look at this one: #539

Thanks!

[DSanich]

Thanks for review @rolznz! Yes sure, I can take it