Update behat-data URLs in tests

Author: swissspidy

features/export.feature

@@ -918,15 +918,15 @@ Feature: Export content.
     Then STDOUT should be a number
     And save STDOUT as {EXPORT_ATTACHMENT_POST_ID}
 
-    When I run `wp media import 'http://wp-cli.org/behat-data/codeispoetry.png' --post_id={EXPORT_ATTACHMENT_POST_ID} --porcelain`
+    When I run `wp media import 'http://wp-cli.github.io/behat-data/codeispoetry.png' --post_id={EXPORT_ATTACHMENT_POST_ID} --porcelain`
     Then STDOUT should be a number
     And save STDOUT as {EXPORT_ATTACHMENT_ID}
 
     When I run `wp post create --post_title='Post with attachment to ignore' --porcelain`
     Then STDOUT should be a number
     And save STDOUT as {IGNORE_ATTACHMENT_POST_ID}
 
-    When I run `wp media import 'http://wp-cli.org/behat-data/white-150-square.jpg' --post_id={IGNORE_ATTACHMENT_POST_ID} --porcelain`
+    When I run `wp media import 'http://wp-cli.github.io/behat-data/white-150-square.jpg' --post_id={IGNORE_ATTACHMENT_POST_ID} --porcelain`
     Then STDOUT should be a number
     And save STDOUT as {IGNORE_ATTACHMENT_ID}