Typo image -> container

Signed-off-by: Ankush Agarwal <ankushagarwal11@gmail.com>

image/spec/v1.md

@@ -243,7 +243,7 @@ Here is an example image JSON file:
         The execution parameters which should be used as a base when running a
         container using the image. This field can be <code>null</code>, in
         which case any execution parameters should be specified at creation of
-        the image.
+        the container.
 
         <h4>Container RunConfig Field Descriptions</h4>