notary/internal/notecheck: update default tile height to 8

Change-Id: I260b9901efdd75d30583489b00626ed11debd8c8
Reviewed-on: https://go-review.googlesource.com/c/exp/+/172665
Reviewed-by: Russ Cox <rsc@golang.org>
diff --git a/notary/internal/notecheck/main.go b/notary/internal/notecheck/main.go
index 4643002..deb57cf 100644
--- a/notary/internal/notecheck/main.go
+++ b/notary/internal/notecheck/main.go
@@ -41,7 +41,7 @@
 	os.Exit(2)
 }
 
-var height = flag.Int("h", 2, "tile height")
+var height = flag.Int("h", 8, "tile height")
 var vflag = flag.Bool("v", false, "enable verbose output")
 var url = flag.String("u", "", "url to notary (overriding name)")