Typo creating -> created

Signed-off-by: Ankush Agarwal <[email protected]>

Author: ankushagarwal

image/spec/v1.md

@@ -391,7 +391,7 @@ interpret them.
 
 An example of creating an Image Filesystem Changeset follows.
 
-An image root filesystem is first creating as an empty directory named with the
+An image root filesystem is first created as an empty directory named with the
 ID of the image being created. Here is the initial empty directory structure
 for the changeset for an image with ID `c3167915dc9d` ([real IDs are much
 longer](#id_desc), but this example use a truncated one here for brevity.