Fix typo

src/cpp/client/channel_cc.cc

@@ -144,7 +144,7 @@ void ChannelResetConnectionBackoff(Channel* channel) {
 
   // ClientRpcInfo should be set before call because set_call also checks
   // whether the call has been cancelled, and if the call was cancelled, we
-  // should notify the interceptors too/
+  // should notify the interceptors too.
   auto* info =
       context->set_client_rpc_info(method.name(), method.method_type(), this,
                                    interceptor_creators_, interceptor_pos);