Typo Update blip-0017.md

"cliets" correct spelling "clients".

Corrected.

Author: mdqst

blip-0017.md

@@ -88,7 +88,7 @@ and must be provided in case HOST wants to terminate the channel but cannot cont
 CLIENT.
 
 The `secret` is an optional blob that can be used by HOST to tweak channel parameters
-in multiple ways: offer an initial balance, tweak the capacity, only allow cliets with
+in multiple ways: offer an initial balance, tweak the capacity, only allow clients with
 a given secret etc.
 
 Upon receiving an `invoke_hosted_channel` message, the HOST, if willing to establish the