fix error valid target in image-layout

xiekeyang · xiekeyang · commit 85352acb1140 · 2017-02-22T19:27:36.000+08:00
In layout.md, The validated target should be image layout itself, not
image index.

Signed-off-by: xiekeyang &lt;xiekeyang@huawei.com&gt;
diff --git a/image-layout.md b/image-layout.md
@@ -134,7 +134,7 @@ The `imageLayoutVersion` value will align with the OCI Image Specification versi
 
 ### oci-layout Example
 
-```json
+```json,title=OCI%20Layout&mediatype=oci%2Dlayout
 {
     "imageLayoutVersion": "1.0.0"
 }

Original file line number	Diff line number	Diff line change
@@ -134,7 +134,7 @@ The `imageLayoutVersion` value will align with the OCI Image Specification versi
`134`	`134`
`135`	`135`	`### oci-layout Example`
`136`	`136`
`137`		-```json
	`137`	+```json,title=OCI%20Layout&mediatype=oci%2Dlayout
`138`	`138`	`{`
`139`	`139`	`"imageLayoutVersion": "1.0.0"`
`140`	`140`	`}`