Google has changed the Search Console feature from "submit to index" to "request indexing" within the Fetch as Google feature. This is actually a week or so old but more and more SEOs and webmasters are noticing it.
It is a subtle change but Google made the change to ensure webmasters know that if they use the feature, it might not lead to Google indexing or ranking the page. Submit to index means you will submit the page to Google's index. Request indexing means it is only making such a request.
Here is a before screen shot: