Added link to the channel logs

Just by analogy to the next one, where the name of the "thing" is a link to the archive:
```
<a href="https://webchat.freenode.net/?channels=jclouds">Chat</a> with us on IRC at <a href="https://botbot.me/freenode/jclouds/">#jclouds on Freenode</a>
```
?