Minor log msg adjustment for passive testing finalization skip (#764)

Closes: #760

host.go

@@ -253,7 +253,7 @@ func (h *gpbftRunner) Start(ctx context.Context) (_err error) {
 					}
 				} else {
 					ts := cert.ECChain.Head()
-					log.Infow("not finalizing a new head because Finalize the manifest specifies that tipsets should not be finalized",
+					log.Infow("skipping finalization of a new head because the current manifest specifies that tipsets should not be finalized",
 						"tsk", ts.Key,
 						"epoch", ts.Epoch,
 					)