Link to Howto Guide from Readme

[s2156945]

It's probably obvious to anyone who's used TS3 control before (I haven't) but maybe this could be added to the readme:

1. Teamspeak 3 Client Tools Menu->Options -> Addons -> ClientQuery -> Settings -> copy API Key
2. StreamDeck -> Streamdeck Store -> Search -> TeamSpeak -> Install
3. StreamDeck -> Search -> TeamSpeak -> Drag Action to Key, Paste API key into "ClientQueryA API Key" box below Title and above the instructions with the link to the awesome guide https://github.com/ZerGo0/streamdeck-teamspeak3integration/blob/master/Docs/API%20Key%20Guide.md, oh man why didn't I see that before.

Scratch that, just link to the guide you've already done from the Readme :-)