Fix image node type in example

wooorm · wooorm · commit 5ad916b5c983 · 2016-02-06T15:01:25.000+01:00
diff --git a/readme.md b/readme.md
@@ -649,7 +649,7 @@ Yields:
 
 ```json
 {
-  "type": "link",
+  "type": "image",
   "title": "bravo",
   "url": "http://example.com",
   "alt": "alpha"
