Fix typo in docs (#166)

Author: Arp-G

guides/introduction/forwarding.md

@@ -47,7 +47,7 @@ def init(_) do
   {:ok, pc} = PeerConnection.start_link(ice_servers: [%{urls: "stun:stun.l.google.com:19302"}])
 
   # we expect to receive two tracks from the web browser - audio and video
-  # so we also need to add two tracks here, we will use them to loop media back t othe browser
+  # so we also need to add two tracks here, we will use them to loop media back to the other browser
   # from each of the web browser tracks
   stream_id = MediaStreamTrack.generate_stream_id()
   audio_track = MediaStreamTrack.new(:audio, [stream_id])