fix: update title of readme (#34)

tk3fftk · web-flow · commit d19e2b88ddf1 · 2019-10-16T17:16:37.000+09:00
diff --git a/README.md b/README.md
@@ -1,4 +1,4 @@
-## sd-cli
+## sdctl
 
 ```
 validate yamls, handle banners, start build from CLI

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-## sd-cli`
	`1`	`+## sdctl`
`2`	`2`
`3`	`3`	```
`4`	`4`	`validate yamls, handle banners, start build from CLI`